???????? Heaviest bullet out of the 1 in 12 twist 22-250

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08-12-2012, 08:06 AM
acemisser

???????? Heaviest bullet out of the 1 in 12 twist 22-250

What is the heaviest bullet you have tried from the 1 in 12
in a 22-250 with good accuracy.....I'm talking like 1 1/2 inch
at 250 yards or better..I want to try mine for f class shoot at
this distance.. Please only info. for 1 in 12....I don;t care about your
9-14 etc twist.. I want to have mine rebarrel next year,but for now
would like to try it...Thanks for all your support...John
08-12-2012, 09:42 AM
brtelec

I found the Barnes Tac-X 62 gr. with 32.6 gr. of IMR-3031 moving at 3570 fps to be very accurate at 300 and 400 meters.
08-12-2012, 10:17 AM
acemisser

Quote:

Originally Posted by brtelec

I found the Barnes Tac-X 62 gr. with 32.6 gr. of IMR-3031 moving at 3570 fps to be very accurate at 300 and 400 meters.

Interesting---the heaviest I have on hand is 60 grain Sierra....I have no 3031 now...I have heard some say that they get the best with 4046--I have not as of yet had any accuracy with it..I might work with the 60 grainers,but not for me with the 55 grain V Max.....But I keep trying...I need a darn good match load for 250 yards,,,
08-12-2012, 01:24 PM
johnjohn301

Quote:

Originally Posted by acemisser

What is the heaviest bullet you have tried from the 1 in 12
in a 22-250 with good accuracy.....I'm talking like 1 1/2 inch
at 250 yards or better..I want to try mine for f class shoot at
this distance.. Please only info. for 1 in 12....I don;t care about your
9-14 etc twist.. I want to have mine rebarrel next year,but for now
would like to try it...Thanks for all your support...John

Barrel FAQ
http://www.6mmbr.com/barrelfaq.html

Calculator for Barrel Twist Rate
http://kwk.us/twist.html
08-12-2012, 03:44 PM
CharlieNC

My 12 twist factory varmint barrel shoots 55gr Vmax at 1/2" at 200 yards using H4350; could not work up a load using widely recommended H380.
08-12-2012, 06:42 PM
acemisser

awesome---i just needmore time to test and load...
08-13-2012, 09:13 AM
coues7

Charley what is your load mentioned?
08-13-2012, 10:47 AM
devildogandboy

hope this helps some.

http://savage-barrels.com/calibers.htm
08-13-2012, 11:09 AM
scope eye

Hi my rule of thumb that works for me is very simple, to get a decent grouping a bullet has to be spinning at a minimum of at least 200.000 rpm, to get that number the formula is 720 times MV divided by the Twist of the barrel, to get a heavier bullet to reach that number all depends on how hot you feel you and your chamber can go, this is what I came up with for the 12 twist you need a MIN of 3333 MV, so the heaviest bullet you send down range at that min MV will be your max weight bullet and still get a decent grouping.

Thanks Dean

PS this is for 22 cal
08-13-2012, 01:35 PM
CharlieNC

Quote:

Originally Posted by coues7

Charley what is your load mentioned?

I use 38.5gr H4350 with the 55Vmax .025" off the lands. After 3 loadings the Lee Collet Neck Sizer has done fine; no need to FL size yet.
08-13-2012, 05:53 PM
Luckus

I use 60 gr Hornady sp's in my 1-14 Swift with no problems, a 1-12 22-250 should work.