nosler data.
RL 19 65.5gr 130gr 3307
63.5gr 140gr 3186
60.5gr 150gr 3007 ballistic tip
60.5gr 160gr 2975 partition only.

this was for the 270 wsm,ballistic tips,accubonds and partitions.

see where i get confused?what happens between the 140gr and 150 gr bullets to warrent such a massive drop in velocity?

why can't i find a legitimate 3100+load for150 gr bullets? sure theres a few people pushing them faster but why is it not in the reloading manuals?
even the federal fusion loads push them at 3080 so they say, and winchester gets their's up to 3150 for the powerpoints.
i can understand if the bottail orthe 'ballistic tip' type bullets invade a little powder space but does it really cause such a leap in chamber pressures?(i'm guessing that's the reason they push the flat base bullets faster ooking at the 15ogr ballistic tip vs 160gr partition.)
please help, i really want to use th 150 gr bullets but if i can't push them faster than 3000fps, then i guess the 140gr accubonds'll 'ave to do.

The best way to get 3100 fps from a 150 grain bullet is to go to one of the 300 mags. That's what their designed to do. Why would you want to push a cartridge past it's designed safe limits?

I've found is it's near impossible to load to factory velocity levels in most cartridges. They use proprietary powders that are not available to us mere mortal handloaders. I can not reach factory 300 Ultra-mag velocities with anything I've tried and stay within safe pressure limits.

The bottom line here is I'd bet a deer wouldn't notice the difference between that 150 grain bullet at 3007 and the 3150 fps factory load.

Be safe.

I'm with Bob on this one.

SOme have goal's that can be reached. To reach that goal one must have the tool design to do it. An 06 can not shoot a 200 gr bullet as fast as a 338X06? Nor will a 7WSM shoot a 180gr bullet as fast as I can shoot the same weight in the 338WSM.

Your delemma as Bob said is to just use the bullet that gets you the velocity you are seeking.

338

The labs don't develop loads to meet velocity targets. They work up until they hit the cartridge's pressure limit (actually until all shots stay just under it with that load), and then quote the velocity they got. They also know that every bullet design produces a different pressure profile. In the interest of safety, they print the data for the bullet that gave them the HIGHEST pressure. That way, no matter which of their bullets you choose, you'll be safe with that data. The high-pressure bullet likely topped out at a lower velocity.

Your approach is opposite. You want to get to an arbitrary velocity, but have no way to measure pressure. So you're essentially operating half-blind. It's sort of a "**** the torpedoes..." approach.

Most of my loads do not even come close to factory specs except for accuracy. I have found that those loads around the starting point shoot a lot better than the maximum loads and don't stress me and my gun near as much.

Here are the energies and pressures (+/-500 CUP) for your loads:

130 gr: 3307 fps / 3156 ft.lbs. 51,800 CUP.
140 gr: 3186 fps / 3155 ft.lbs. 51,800 CUP.
150 gr: 3007 fps / 3011 ft.lbs. 50,000 CUP.
160 gr: 2975 fps / 3145 ft.lbs. 51,600 CUP.

They are all very close. You would need to increase the velocity of the 150 grain bullet by only 71 fps to develop the same energy and pressure as the other loads. That difference will probably require 1/2 to 1 grain additional powder to obtain 3078 fps / 3155 ft.lbs, 51,800 CUP.

Try both ways. The load at 3007 fps may even be more accurate.

thanks NITRO, some usefull info there.
this is not a deer load i'm after but a tahr load, for 'way out there' at times,
in the new zealand southern alps.
my tikka t3 ss shoots magic with almost anything i put through it, if i keep the velocity below 3050fps it should keep you fellas happy eh? on the other hand, if i find a way to push it out to 4000fps i'll let yiz know.

If the 150fps makes that much difference to you for what your hunting, just buy the Winchesters...

i wanted to use the 150gr A frames, and the extra velocity would be helpfull with keeping the trajectory close enough to the 130grain projectiles so i can use the ballistic recticle the same for both.
winchester ammo is about $60US a packet here, so that is outta the Qn.
the reason for my initial post had something to do with this:
140gr-3200fps/150gr-3000fps....

if i keep the velocity below 3050fps it should keep you fellas happy eh? on the other hand, if i find a way to push it out to 4000fps i'll let yiz know.

If you get 4000 FPS and if you can, let us know... doubtfull we'd hear the explosion from there!:D

talk'n about explosions, try a pancake of gelignite(spelling?) on a flat rock, now there's one
**** of a bang.

I'd say to just practice with the load you shoot and you haven't got to worry about 100 Fps. It makes no difference. Precision beats power everytime. That's why I've parted with all my big kickers and now I reach far with a precise 25-06.

I'd say to just practice with the load you shoot and you haven't got to worry about 100 Fps. It makes no difference. Precision beats power everytime. That's why I've parted with all my big kickers and now I reach far with a precise 25-06.
i started off with 22lr head shots when i was 12 yrs old(browning pump action+power points) and it worked just fine, but when you see the trophy of a lifetime and can't take the shot because youre 'unsure of the outcome' , you know that something bigger is in order.
got no worries about precision: search youtube with my user name and you'll see the same results: comparing the 270wsm to the 223rem.
Thinking about taking up traditional bow hunting, as i miss the 'close' stalking aspect of hunting.
Been experimenting with the atlatl aswell, with cedar darts. punch through 20mm ply easy.(@~20yards).

would you buy the 'love of your life' a diamond ring or a cz ring, they both look the same, and she doesn't care 'cause' she's don't know.(and/or hopefully she loves ya aswell).
the deer don't care what kills it 'cause its dead.
I care what I shoot it with and I like the fact that that I have a choice.

You might want to consider one of the real magnums instead of the Short mags. The 7mm RUM can reach velocities of 3600 fps with 140 grain bullets for that reach out and touch um feeling. Put a muzzle brake on it and recoil is down in the 280 Remington class.

I can get 3100 fps with the 150 grain bullet in my 270 Weatherby Mag, but that's with a 27 inch barrel. I don't think this velocity can be safely achieved with the 270 short mag.

I've got the new Nolser manual and they list 4 loads that will get 3100fps with 150gr bullets in the 270WSM using MagPro,RL-22,N-170 and IMR-7828 powders. Nosler,Hornady manual use custom barrels for the 270WSM and Hornady uses a factory rifle so some of the data can be misleading as Hornady only has one load over 3100fps with a 150gr bullet and Hornady doesn't have any listed. I've got a custom 270 and I can get just over 3000fps with 150gr bullet in a 24" barrel and I'm not sure but doesn't the Tikka 270WSM have a 23" barrel so that will effect velocity some. What I would do is buy a box of factory 150gr ammo and shoot that over a chrony so you could get a benchmark on velocity in your rifle. Well good luck

if you want 130 gr ballistics with that 150 bullet just look at the 300 yd velocities i bet you will not complain about 75 muzzle fps
five dog

look at all the picture not just the braggin end

if you want 130 gr ballistics with that 150 bullet just look at the 300 yd velocities i bet you will not complain about 75 muzzle fps
five dog

look at all the picture not just the braggin end

Not trying to butt in but if your looking at hunting loads wouldn't you also consider BC,energy and bullet drop beside just looking at velocity when comparing a 130gr vs 150gr bullet?

You might want to consider one of the real magnums instead of the Short mags. The 7mm RUM can reach velocities of 3600 fps with 140 grain bullets.......

Bingo!!

It's a "right tool for the job" sorta thing. The .270 WSM is a great round and there's no pox on it from me. But if you want to get 140's or 150's running big speeds........you're going to have to put more of a fire behind it than what you can fit in the WSM case.

Don't forget the 7-STW for your long range work. I've become quite attached to mine lately. I'm loading a grain under what Layne Simpson calls a max dose of 7828 and getting a chrono'ed 3605 fps out of 140 Accubonds. Case life is great, primers only slightly flattened, the pockets staying tight forever and buttery-smooth blolt lift. Recoil is not that objectionable either. I also load 130 gr. Match Kings over a hatful of R-22 and they fly like lasers to 600 yds at least. It's been too darned cold to chrono them. But working backward from bullet drop at 600 yds on a ballistics program they seem to be going around 3800 or 3850!! Doesn't sound right. But figures generally don't lie. :confused:

3 Grs. less of powder and 10 extra Grs. of bullet your lucky its only 150 fps difference.

nosler data.
RL 19 65.5gr 130gr 3307
63.5gr 140gr 3186
60.5gr 150gr 3007 ballistic tip
60.5gr 160gr 2975 partition only.

this was for the 270 wsm,ballistic tips,accubonds and partitions.

see where i get confused?what happens between the 140gr and 150 gr bullets to warrent such a massive drop in velocity?

why can't i find a legitimate 3100+load for150 gr bullets? sure theres a few people pushing them faster but why is it not in the reloading manuals?
even the federal fusion loads push them at 3080 so they say, and winchester gets their's up to 3150 for the powerpoints.
i can understand if the bottail orthe 'ballistic tip' type bullets invade a little powder space but does it really cause such a leap in chamber pressures?(i'm guessing that's the reason they push the flat base bullets faster ooking at the 15ogr ballistic tip vs 160gr partition.)
please help, i really want to use th 150 gr bullets but if i can't push them faster than 3000fps, then i guess the 140gr accubonds'll 'ave to do.


Ok, I would like too say 1st That I own a 300 SAUM matter of fact 2 of them,sold one recently. Well my exp with finding a fast acc, load was very hard,as I followed the recomendations of reloading data and Online chat room info....Long story short , I couldnt get near the "claimed" velocity by the makers of the short mags,UNTILL I quit using the suggestd average burning rate powders such as 4250 etc. I was playing around with different burn rates one week , and working up loads.I was using a 165gr sierra SPBT , powders ranger from H-414 too something real slow for the 30 cal I guess 4831 maybe (dont quote me) but it was slow. Every load had the same bullet seat depth and primer,just different powder and charges.Thgis experimentt too a couple wks,I found that accuracy began too improve with the faster burning powders and so did the velocity unlike my standard cartridges and standard magnums. I eneded up buying some VV N-540 since I seen how it compared too nH 414 on several burn rate charts........Well the end result ,Im well over fact velodcity and acc. is very nice,The rifle is a M700 in an accutaye Inn. lam stock , the load is VV N-540 ,165gr sierra SPBT ,groups are an average 3 shot 3/4" at 100yds at an average velocity of 3050fps , velocity spread is around 30fps maybe,I cant remember but it isnt more than that , and NO signs of high pressure.

I have spoken topo many locals in my ar4ea that load for the short mags and they all said the same thing,hard as **** too find a good load ,their nowwhere like loading for the classic cartridges.They also agrred with me that they found the best acc. and velocity with the powders that had a slightly faster burn rate than what was listed in most manuals.

Know let me be clear on this,Im not telling you too get the fastest burning powder and load it too its max.You need too work from what was listed doen too the next fastest and work that load uop to its potential,it takes time but will be woprth the effort if your heart is set on the short mag.

Just my .02 and personnal experiance

You might want to consider one of the real magnums instead of the Short mags. The 7mm RUM can reach velocities of 3600 fps with 140 grain bullets for that reach out and touch um feeling. Put a muzzle brake on it and recoil is down in the 280 Remington class.


I think the short mags are the best thing to come along since the 7mm mag, the sales certainly tell the story. I have both a 300 and 270 wsm and I like them both. My neighbor has a 300 RUM, he had to put a muzzle brake on it cause of the recoil. I talked to one of Noslers people a few years ago and he has a 300 RUM, he went to Africa with it, he wished he would have taken his 300 wsm instead, too much noise and too much recoil. The RUMs require alot more powder just to get a few hundred extra fps, this in turn causes more barrel wear and throat erosion, not worth it. The wsm's are real magnums and the real thing.

nosler data.
RL 19 65.5gr 130gr 3307
63.5gr 140gr 3186
60.5gr 150gr 3007 ballistic tip
60.5gr 160gr 2975 partition only.

this was for the 270 wsm,ballistic tips,accubonds and partitions.

see where i get confused?what happens between the 140gr and 150 gr bullets to warrent such a massive drop in velocity?

why can't i find a legitimate 3100+load for150 gr bullets? sure theres a few people pushing them faster but why is it not in the reloading manuals?
even the federal fusion loads push them at 3080 so they say, and winchester gets their's up to 3150 for the powerpoints.
i can understand if the bottail orthe 'ballistic tip' type bullets invade a little powder space but does it really cause such a leap in chamber pressures?(i'm guessing that's the reason they push the flat base bullets faster ooking at the 15ogr ballistic tip vs 160gr partition.)
please help, i really want to use th 150 gr bullets but if i can't push them faster than 3000fps, then i guess the 140gr accubonds'll 'ave to do.


Contact Ty at Barnes bullets tyh@barnesbullets.com
He might be able to help you. Barnes used to make an xlc bullet that increased velocity over conventional bullets from anywhere from 50 to over 100 fps. These bullets may still be available on line from some of the sporting goods stores, Graf and sons and Natchez shooters supply may have some still in stock. Good luck.

Might want to red this
http://web.archive.org/web/20050307034920/shortmags.org/shortmags/270wsm-detail.htm

I have a 300WSM with a 24" Broughton 5c 1/12 twist barrel it was chambered with one of the first Pacific reamers made I was having some pressure problems finally had it throated just alittle longer so everything would just fit in the magazine and it really made a difference I was able to get over 3200fps with 165gr bullets and 3185fps with a 180gr bullet. I have a factory T-3 300WSM and that rifle gets 2952fps with a 180gr bullet and 2999fps with 165gr bullet and I use the same amount of powder for those two bullets, if I up the powder 1/2 gr for the 165 gr bullet velocity goes to 3056fps.

Friend of mine purchase a new Win FWT in 270WSM after maybe 100rd he had that rethroated alittle longer and he is getting 3200fps with 140gr bullets using MagPro and he is the only one I know shooting a 270WSM. We have afew guys in our gun club shooting 300WSM/325WSM etc and they seem to like them I don't know anyone shooting a Rem short mag.

Sometime this month my new 270WSM will be finished and I'm having it throated alittle longer gave the gunsmith some dummy rds with 150gr bullets. I'm figuring high 3100fps maybe 3200fps with a 150gr bullet and if I was to shoot 130gr bullets low 3400fps.

I think in the custom rifles if you get to pick barrels and chambers the WSM will shoot to their potential and I fully understand a shooters dislike for the WSM/WSSM etc. I sure didn't get rid of any deer/elk rifles just added the WSM hoping to use the 270WSM on antelope this year maybe late elk. Just my .02