Can anyone tell me how 70 gn speers perfom in a 1in14 twist barrel i currently load 55gn with good results but would like to try somthing heavier cheers dennis.

Can anyone tell me how 70 gn speers perfom in a 1in14 twist barrel i currently load 55gn with good results but would like to try somthing heavier cheers dennis.


Have had MOST 1:14's work fine with the 70gr. speer round nose...it's a short length bullet, and that will usually let it spin true in a 1:14. The ones that didn't shoot it well didn't key-hole the bullet...it was stable...it just shot poorly ion that barrel.

The Sierra 63gr. Semi_point is another one worth a try for a heavy weight in a 1:16. Another short bullet (no longer than spitzer 55's and SHORTER the boat tailed 55gr. Nosler BT's).

Why? Some of us will call coyotes in pretty close...some of use use .22centerfires even in thicker bursh where nothing is long range....and the extra weight seems more of a benefit than the long range possibilites of a sharp spitzer being used a under 200yards.

I haven't tried Speer 70's but did try Barnes 70's in my 788 in 22-250. That experiment was unsuccessful in both areas. The accuracy left much to be desired and the bullets blew up with out penatration on antelope.

I haven't tried Speer 70's but did try Barnes 70's in my 788 in 22-250. That experiment was unsuccessful in both areas. The accuracy left much to be desired and the bullets blew up with out penatration on antelope.
thanks for your help guys IM having it accurised buy a reputable gunsmith I'll keep you posted.dennis in nz

Not much use to you, but the AR's decked out for match shooting to include 80 grain VLD's usually have 7.5" to 8" twists. 9" isn't bad with most bullets and will shoot the VLD's on a hot day. A lot of people swear by slower twists that just barely stabilize the bullets, but they also pick up sensitiviy to air density. That means low altitudes, incoming weather fronts, and cold weather can all turn the finely tuned load into a mess maker. There was at least one well-known benchrester in the late '80's who actually had his best accuracy load start to tumble on a cold day. I can't recall the name? Anyway, for all-weather shooting, I would limit the length of your bullets, as Ribbonstone said. You'll have potential issues as bullets get longer than about 0.75 inches, though some will work under some conditions.

As I recall, the 70 grain Speer was designed to perform in the standard 1:14 inch twist of .222 and .22-250. There were several articles about this bullet in the older Gun Digests, including one about using the 70 grain Speer in a Remington 788 .22-250. No problem with stability or performance on deer.
Cannot compare this bullet, with its length and construction, to others. Each is different.

As I recall, the 70 grain Speer was designed to perform in the standard 1:14 inch twist of .222 and .22-250. There were several articles about this bullet in the older Gun Digests, including one about using the 70 grain Speer in a Remington 788 .22-250. No problem with stability or performance on deer.
Cannot compare this bullet, with its length and construction, to others. Each is different.


I've seen it used on deer...at least little deer...but a man who swore by his BLR in 22/250. In his hands, it worked fine.

Have shot coiyotes with it, and the indications are it acted n more like a big game bullet than a varmint bullet...which would be what it was designed to do.

Still not a fan of .224's on deer, but if you "just gotta", then the 70gr. Speer impacting (not the launch speed...the landing speed) at something under 3000fps would probably do the job.

Well thanks for all the help guys but it turns out my beloved 788's barrel is shaged so im looking at a new one my gunsmith says that mine is a short action and to short for the .243/308 family so he has a new s/s 6mm barrel 1in13 twist so i'm thinking 6mmbr remington What do you think?

If you are going with the barrel that he has at hand, then there would be nothing wrong with the 6mm BR, although it might not feed from your magazine.
If you don't use his barrel, you could always get a new .22-250 barrel with a tighter twist (if you want to use some of the heavier bullets), or even the .250 Savage (parent case of the .22-250), and use some of the 70 and 75 grain bullets that are found in that calibre.

. . . he has a new s/s 6mm barrel 1in13 twist so i'm thinking 6mmbr remington What do you think?

Sorry about the tube. I thought you said it was still running with lighter bullets? Normally, when a barrel is shot out, the symptom is intermittent unexplained fliers that get more and more frequent. The last time I shot out an M1A barrel, I first noticed I was getting one uncalled flier, about 1 m.o.a. outside my normal groups, every 20 shots. I'd have to check my records, but it seems to me that over the next, maybe, three hundred rounds, it worked its way up to 1 in 10 then 1 in five. By then it had dawned on me that I wasn't the culprit, replaced the barrel.

As far as that 13” 6mm goes, it is another slow twist. Unless you are planning to shoot light, short bullets exclusively, I would be looking at something faster. Even if you're not planning to shoot the 107 grain Sierra Match Kings, you want to identify the longest bullet, and select your twist based on that.

I've previously posted the Excel workbook below for estimating rifling twist (first worksheet in file) and bullet stability evaluation (second worksheet in file) before. The first worksheet is based on Don Miller's excellent article in Precision Shooting in March, 2005. If Al is right that the 70 grain Speer was designed to be stabilized by a 14" twist, it seems this estimator comes closer than the more sophisticated JBM and RSI Shooting Lab software stability calculations. It says 1 in 13.88" is on the edge of instability (s=1.0) and just under 11.75" is optimal to meet Harold Vaughn's criteria. The more sophisticated calculators say about 1 in 10" to 1 in 11” are on the edge of instability. They don’t like this bullet shape, it seems.

To use the Excel twist rate worksheet, i recommend you start by selecting the longest bullet you want to be able to shoot, and set the desired s value to 1.1 for your most dense air (highest barometric pressure and lowest temperature) atmospheric conditions, and don't get anything slower.

The stability evaluator worksheet is based on Harold Vaughn's graphical work on the effect of crosswind on vertical as well as horizontal displacement for different values of s. This will let you test what you have. You can download this workbook below.

---->

Sorry about the tube. I thought you said it was still running with lighter bullets? Normally, when a barrel is shot out, the symptom is intermittent unexplained fliers that get more and more frequent. The last time I shot out an M1A barrel, I first noticed I was getting one uncalled flier, about 1 m.o.a. outside my normal groups, every 20 shots. I'd have to check my records, but it seems to me that over the next, maybe, three hundred rounds, it worked its way up to 1 in 10 then 1 in five. By then it had dawned on me that I wasn't the culprit, replaced the barrel.

As far as that 13” 6mm goes, it is another slow twist. Unless you are planning to shoot light, short bullets exclusively, I would be looking at something faster. Even if you're not planning to shoot the 107 grain Sierra Match Kings, you want to identify the longest bullet, and select your twist based on that.

I've previously posted the Excel workbook below for estimating rifling twist (first worksheet in file) and bullet stability evaluation (second worksheet in file) before. The first worksheet is based on Don Miller's excellent article in Precision Shooting in March, 2005. If Al is right that the 70 grain Speer was designed to be stabilized by a 14" twist, it seems this estimator comes closer than the more sophisticated JBM and RSI Shooting Lab software stability calculations. It says 1 in 13.88" is on the edge of instability (s=1.0) and just under 11.75" is optimal to meet Harold Vaughn's criteria. The more sophisticated calculators say about 1 in 10" to 1 in 11” are on the edge of instability. They don’t like this bullet shape, it seems.

To use the Excel twist rate worksheet, i recommend you start by selecting the longest bullet you want to be able to shoot, and set the desired s value to 1.1 for your most dense air (highest barometric pressure and lowest temperature) atmospheric conditions, and don't get anything slower.

The stability evaluator worksheet is based on Harold Vaughn's graphical work on the effect of crosswind on vertical as well as horizontal displacement for different values of s. This will let you test what you have. You can download this workbook below.

---->
:) Cheers unclenick it was shooting ok with the lighter stuff but it went off when testing the 62gn so i got my smithy to check it out and he said the throat was had it and the rifling was abit dull. So i went to my barrel man and he had a number of barrels available but no .224 he had a 6mm and last week he called me and said he had a .257 barrel that was a cancelled order was i interested the end result is that he has the rifle now and i asked for it to be .250 3000 it will end up 22in long and its twist is 1in10 that will solve any probs with feeding and I've been doing a little reading on the cal and i'm keento see how it all pans out.Many thanks Dennis.

Now you're talking....250savage is a wonderful, if under appreciated, round.

Just a thought, but the 250 (Savage) Ackley Improved would be a scorcher out of a 22 inch tube!

Can he get a reamer?

Might be worth looking into!

Papajohn