Just got my new Barnes reloading manual and in looking up my favorite cartidge, the 350 Rem mag, TAC powder was listed. Gave great velocities. Was also listed as a top accuracy load for the 458 WIn.

I've never heard of it...have you?

Yep. Seen it on the shelf in the gun shop(s) here. Never used it, though. Try some and let us know how you like it?

Yep, made by Ramshot:

http://www.ramshot.com/powders/

It's a double based spherical powder that's supposed to be temperature insensitive. I've used in the 223 Rem and 35 Rem. Still working on loads in those though but have gotten some very good velocities. Their Hunter powder also gave me some excellent velocities and groups in my 270 with 150 grn Hornady bullets. It's also about the most inexpensive power too...I think I paid around $14 for a lb of it.

I tried it last weekend and the jury is still out (did not seem to do better than the 748), I have lots of testing to do yet (have not ran it over the chrono yet either)so I'm not sure if it is worth the switch., I'll be going through Vancouver on my way to Portland for drill if you'd like to borrow some.

TAC is superb, especially in the 223. Flows like water, burns exceptionally clean, gives great velocity and (if it matters) is billed as temperature insensitive. TAC is the powder used by Black Hills to load all their top-end match ammo, and that is wonderful ammo indeed. That should tell us something.

I can't say how much it would matter, if at all being temperature insensitive. I've chrony'd the same load (if I remember right without digging out my data) about 70 fps less with one powder with a 30* temp difference (80 & 50). Some thoughts of mine are what if you work your loads up when it's 85 and don't verify your zero and go out hunting when it's 35, will it change POI? Or if you work up a load that's max (or beyond as we know many do) and it's 40 and then shoot it that summer when it's 80, how much will it increase pressure and how dangerous could that be?

It really only changes your POI past 300ish yards. Its more of a factor with small calibers and lighter bullets. Nick has a great post on the effects.

Chronoed some loads yesterday. Gave an honest 150 fps more than BLC(2) in my 350 Rem mag. Getting 2840 fps w/ a Barnes 225gr TSX from my 22" barrel.

Will back this off a bit and check for accuracy. Rl 7 has given me the most consistent accuracy to date, but only at 358 Win velocities. BLC(2) has not been consistent, so my hopes are with TAC to getting accuracy as well as great velocities.

SWEET! I loaded some up at 61.5 and sot them did not do bad still way under 2" I'll have to run some over the chrono! What load did you use?

60.0 gr...2708 fps
61.0 gr...2819 fps
62.0 gr...2842 fps (bolt lift is slightly tight)

This is the first powder I've tried that gives anywhere near Load manual velocities. Barnes gives 2764 fps for a 62.0 gr load...w/ a 20" barrel. Until now, I was resigned to having a "slow" barrel.

Will load up some test loads for accuracy at 61.3, 61.5 and 61.7 gr...after I mow the lawn.

Thanks, I'll have to get loading!!!!!!

Those numbers take the .350 from equalling the 35 Whelen, to burying it.

I really like W748 but for 150 FPS more, its worth trying.

leverite- are you shooting the Ruger or the Remington?

I have a Rem 673. Wish I had a longer magazine box, so I could go longer than 2.8" with my loads, but what the hey, otherwise a great rifle.

Yea, I've got the Ruger... my magazine box measures 2.95" which might be long enough to use the Nosler Accubond. I need to seat some bullets out that far and check to make sure they will feed. I really like the Accubond in my 25/06 and .280, and since they discontinued the .358" 225 grain Ballistic Tip, I can't really afford to be plinking with Partitions.

60.0 gr...2708 fps
61.0 gr...2819 fps
62.0 gr...2842 fps (bolt lift is slightly tight)

This is the first powder I've tried that gives anywhere near Load manual velocities. Barnes gives 2764 fps for a 62.0 gr load...w/ a 20" barrel. Until now, I was resigned to having a "slow" barrel.

Will load up some test loads for accuracy at 61.3, 61.5 and 61.7 gr...after I mow the lawn.
I ran mine over the chrono today and got 2750 with 62 gr and a col of 2.915, I'd like to get that las 100 fps but am happy to live with what I got too.
according to my ballistic cal.
@300 yard with 200 zero 2068fps 2137fpe -8.75 drop The recoil was 32ft/lbs, and 16.25fps not to shabby put us right there with the 338 winny.

hmm...wonder if my chrono is reading fast? I'll have to check it next time w/ some known loads.

Black tail, What barrel length do you have?

I've got a 22" tube. I'm happy with 2750fps, This will make a fine elk/bear load! Lets hoe it shoots this load well!

I'm still puzzling over the difference in numbers. In this case I remember I was shooting closer to my chrono than normal...only about 5' away, so my velocities are true muzzle velocities.

Not that the difference is significant to killing power, but it might affect the trajectory a bit. I sight in at 200 yards normally, so when I get to that point, I'll know for sure.

I'm feeling good about this powder/bullet combination, too. It's not too early to be getting these loads ready for a fall hunt.

Time heck I've got two weeks till bear season starts! I sos not measure how far the chrono was away I'm guessing 15-20' the difference in trajectory with that little difference in velocity is with in the tolerance of the shooter. I'll be in Portland all next week so I'll be able to stop by sportsman and pick some more up!

Time heck I've got two weeks till bear season starts! I sos not measure how far the chrono was away I'm guessing 15-20' the difference in trajectory with that little difference in velocity is with in the tolerance of the shooter. I'll be in Portland all next week so I'll be able to stop by sportsman and pick some more up!

I bought the last 1# jug of it at SW in Vancouver last week.

I bought the last 1# jug of it at SW in Vancouver last week.
what is their price? I need some more bullets too, this will be my third box of tsx and far from my last.

FYI,

Muzzle blast acts on the base of a bullet to cause additional acceleration of it after it leaves the tube. This was demonstrated by Harold Vaughn with a specialized magnetometer, and RSI's Jim Ristoe says German Doppler radar experiments to check the accuracy of different chronographs showed the bullets gaining that velocity, then losing it again over about 11 feet or so. The exact number would vary with the gun and the ballistic coefficients of the bullets involved.

My point is, the actual muzzle velocity will be exceeded briefly, and an instrument out at 10 to 15 feet is going to read pretty close to the actual MV. Since you don't know the exact amount of the additional acceleration due to muzzle blast acting on the base of the bullet, it is probably best to use data taken out far enough that you don't risk muzzle blast interference with the readings. The traditional 15 feet is fine. Then tweak that velocity upward in your exterior ballistic software's muzzle velocity input until it gives you a 15 foot velocity that matches your chronograph reading. Use that tweaked muzzle velocity as the equivalent MV for generating tables for other ranges.

Chronograph accuracy is an issue. Since individual guns that are otherwise identical will shoot the same loads at different velocities, there is no reliable means available for the individual to calibrate a chronograph. I have noted elsewhere that Chrony's accuracy specification on their web site is just the resolution of their timebase, and does not include the sky screen sensor spacing or lighting conditions or any of the other factors that can affect actual reading accuracy. It would be nice if someone had the money to do a more critical analysis of a statistically significant number of these things.

unclenick...great advice, and it keeps the face of the chrony from looking like it was in a fight.

black tail...SW charges $17 for a pound of TAC.

I'm interested in trying it in my 356 Win as well as for a 308. Need to find some loads though.