Krieger 8.7-8.3 gain twist dasher

S

skeetlee

Active member
Fellas here in a couple weeks i will be attending my first ever 600 yard shoot. The only rifle i have at the moment is a Krieger gain twist f-class rifle. It will be ok on top of the table but after talking with a good friend about the gain twist barrels in cold weather i am wondering if it will be a waste of money for me to shoot this rifle. I hear that the 8.7-8.3 gain twist barrels plain just dont shoot well at all in cold weather, even at dasher speeds. I was hoping someone with some personal experience could confirm or delet all this. My friend is a very good long distance shooter, but the info he passed to me was passed on to him, so like i said i am looking for solid personal info. I do want to attend very much but no need to through away 75 bucks if the bullets wont get to the target. I will be shooting 105gr bergers 33.6gr of RE15 or Varget. Thanks lee
 
Go and shoot, What is the worse that could happen? Even if you don't do well. It would be a learing experince. :)


B-man out. :D
 
I am going to try and shoot local before the shoot, but it isn't looking like i will get the opp. Girls have pop pop comps all day today and tomorrow, weather isn't the best, and the club is 40 miles down the hill. I am going to go to st Louis no matter what anyway as there is a Varmint for score match the day after the 600 yard shoot. I have a great rifle for that event, and who knows, Maybe Benchmark Barrels will call on Monday and tell me my new barrel is done. if that happens life will be good!!! I had some 105 a-max blow up on me the other day in this gain twist barrel of mine, and i have wondered why ever since. The 105 bergers didnt blow up. Just the a-max. I really dont understand why, and i always seem to think i need to know why! LOL!! I am just curious, thats all!! Thanks Lee
 
Gain twist in cold weather

I guess I'm interested someone explaining the physics of why a gain twist barrel would not shoot in cold weather. Maybe this was shooter who didn't have a good day at the range-it was cold-its the gain twist barrel????????:eek::eek::eek:
 
i am interested in knowing myself thats why i brought up the topic. i will add that the friend that was telling me about this is a respected shooter in long range shooting. it wasnt his personal experience but it was one of another respected shooter from the st lois area. and like i said abouve these kinds of topics and reads enterest me very much. thanks lee
 
The gain has nothing to do with the cold weather. You need to look only at what the bullet is doing at the time it exits the barrel. If a 1 Turn in 8.3" twist will stabilize the bullet at the velocity you're getting (the cold weather may have something to do with the velocity, but not any differently than if you were shooting a straight 1-8.5 twist) it will shoot.
 
The cold will affect your dasher in 2 ways.
RE15 is more temperature sensitive than most powders, so its velocity will drop down a tad in the cool weather, maybe dropping it out of its accuracy node until you bump it up.
As for the gain twist, it isnt the gain, but the final 8.3" twist which might be at fault. 8.3" twist might be marginal for the length bullet you want. In warm weather with less dense air, no problem, but if the air is very cold and dense, then you need more stability.
Maybe a shorter bullet (108gn Berger??) might be worth trying if it is realy cold. ( or much better still, sell me the barrel, it is nice and warm here):)
 
The barrel in question only has about 50 rounds through it and it shoots the 105 bergers into one ragged hole at 100 yards. I got it late in the season last year and havent spent much tyime with it. I think i will load some 105 bergers with some varget powder and give it a shot. Like mentioned above, maybe i will learn something! LOL!!! Thanks Fellas, Lee
 
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