barrel twist
Picked up a single shot Kennedy custom High Wall in 25-06 cal with a 1"dia crowned 26"L barrel with a 1:12 TWIST. What weight bullet will give me .500 moa at 200yds?--300yds?
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I have a Savage 10FP .308 with a 24 inch barrel,excellent rifle shoots 3/4 inch groups at 200 yards. But after the barrel warms up during a match the cross hairs start to turn to the left. At first I thought it was the scope but after changing scopes three times I now believe it is the rifle.
Has anyone else had this problem and if so how can I correct it?
Thanks for helping.0 -
Sorry, you just haven't given enough information. The optimum twist will vary with bullet diameter and length. The bullet diameter and length will be determined by the application. If you know what the gun is to be used for - and have determined what calibre and weight/style of bullet you want to use, give that information and we can help.
If you only know what you want to use the gun for - but need help selecting calibre, cartridge, bullet (weight/style) That will open a whole other topic - and enough answers (each different) for a board all by itself.
Best.............!0 -
Need some further defining. Does it make any difference if the twist is clock wise or counter clock wise?
B - BreatheR - RelaxA - AimS - SightS - Squeeze0 -
Twist rate determines the weight of the bullet needed. Take a twist rate comparison of any caliber, let's say it's a XX caliber, and when you research, you find that in that caliber, the twist rates available are from (this is hypothetical) 1:7 to 1:12. And the bullet weights available are from 100gr to 165gr. If your barrel is at the heavy twist end of 1:7, then your barrel will prefer the heavier bullets in the 150-156 gr range, if the twist rate is on the lighter side of 1:12, then your barrel will like the lighter bullets in the 100-120gr range. If it is in the middle range of the twist, the barrel will prefer the middle range weighted bullets. This is what I find most of the time, now handloading and increase/reduction of powder can change this, but for 90% of the time, this rule works for me.
A great rifle with a junk scope,....is junk.0 -
quote:
Need some further defining. Does it make any difference if the twist is clock wise or counter clock wise?
Only if you're shooting South of the Equator (or while standing on your head, tee hee...)0 -
If you're talking about the 223, 22,250, 220 Swift, most factory rifles would have a 1-14 inch twist. Possibly you might find a 1-12 twist 22 caliber production rifle. The 6mm family will be 1-9 or 1-9.5 or 1-10. Some of the high grade match barrels in 22 or 6mm will be 1-7 or 1-8 twist which will allow the stabilizing of heavier longer bullets as in the "VLD's" (very low drag). If you want a quality barrel you can get a Shilen Match or Hart Match barrel and one of my favorites is a Douglas Air Guage Match Barrel. There are a lot of good barrelmakers out there and if you get one of their match barrels it should shoot IF!!!! the machining and gunsmithing that goes into preparing the action and fitting the barrel and cutting the chamber is done to the highest standards possible. A lot of people can rebarrel a rifle, a lot less can do it with perfection and that costs!! GHD 0 -
I'm talking about a 10/22 bull barrel for my son to shoot at targets at gun shoots. I've seen 2 different barrels one with 1/14 and one with 1/16 twist. thanks for all your help so far. 0
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