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So, should I change barrels?

 
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  #8  
Old 10-20-2013, 09:14 AM
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Re: So, should I change barrels?

2600 is certainly lower than I was guessing at. I'd be interested to hear what happens with one of the faster powders.

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Old 10-20-2013, 09:17 AM
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Re: So, should I change barrels?

So I am a little confused? Is the velocity your getting the disappointment or the group size your getting with the bullet? If its the bullet let be know, I want to help, I have this Berger thing down to a science.

Jon
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Old 10-20-2013, 09:32 AM
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Re: So, should I change barrels?

Quote:
Originally Posted by ICANHITHIMMAN View Post
So I am a little confused? Is the velocity your getting the disappointment or the group size your getting with the bullet? If its the bullet let be know, I want to help, I have this Berger thing down to a science.

Jon
My understanding is that velocity is the only issue. It sounds like a well built rifle and he's apparently getting good results on the accuracy side.
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Old 10-20-2013, 09:38 AM
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Re: So, should I change barrels?

Quote:
Originally Posted by ICANHITHIMMAN View Post
So I am a little confused? Is the velocity your getting the disappointment or the group size your getting with the bullet? If its the bullet let be know, I want to help, I have this Berger thing down to a science.

Jon
In my previous post I wrote, velocity is the only issue. I couldn't be happier with precision and accuracy. Right off the bat, shots 1-15 never grouped more than 3/8" with 3 shot groups at 100 yards and that's with cleaning between each shot.

I still appreciate any help though with Berger bullets. I won't say I have it all figured out but my targets aren't disappointing at all. But I couldn't get more than 2720fps with any tested powder no matter the charge under the 140 Berger.
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Old 10-20-2013, 09:51 AM
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Re: So, should I change barrels?

Just had a thought Derek

I seem to remember reading somewhere a while back that gain twist rifling somehow allowed higher powder charges than standard twist barrels.......if memory serves, it was due to the slower or more gradual pressure curve. Theoretically, the pressure doesn't peak as early with gain twist.??

Curious, have you went until you actually saw definite pressure signs?
Perhaps the faster powders will get you to the velocities without the signs that others have seen with standard twist barrels.
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Old 10-20-2013, 09:53 AM
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Re: So, should I change barrels?

Quote:
Originally Posted by Derek M. View Post
I'm my previous post I wrote, velocity is the only issue. I couldn't be happier with precision and accuracy. Right off the bat, shots 1-15 never grouped more than 3/8" with 3 shot groups at 100 yards and that's with cleaning between each shot.

I still appreciate any help though with Berger bullets. I won't say I have it all figured out but my targets aren't disappointing at all. But I couldn't get more than 2720 fps with any tested powder no matter the charge under the 140 Berger.
Oh I see, sorry I missed that. The speed does seem low, considering I was pushing a 140g AMAX at 2950 from a 260 rem 26" barrel. I wish I knew how to help you, I would think 3000 fps would be on the slow side for that round, but I really don't know. I suppose you need to just finish with the powders you have not tried.
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  #14  
Old 10-20-2013, 09:54 AM
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Re: So, should I change barrels?

It's all about priorities. Personally, 26" is "my" minimum for long range rifles and have recently built 3 rifles using two 27" barrels and one 26" barrel plus brakes... all to be carry rifles.

So is another 25-35 fps per inch worth swapping out barrels?

2600 fps sounds a little slow even for a 24" tube. My experience with RL17 is it got me another 200 fps in the 25-06 (26" barrel) and 300 WSM (24" barrel) and another 50-150 fps in the 7 RM (24" barrel)

Varget would be another interesting choice and probably more stable than RL17
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