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3 groove Barrels

 
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  #1  
Old 08-14-2008, 09:06 AM
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3 groove Barrels

How many of you have used a 3 groove barrel and what is
your opinion on there performance.

Barrel life,accuracy,velocity, brands and so forth.

Thanks
J E CUSTOM
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  #2  
Old 08-14-2008, 10:17 AM
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Re: 3 groove Barrels

I've only had one so this really isn't very objective but I won't do it again. I had a 3 groove Lilja on a 270 AM and while it shot very well, it Cu fouled worse than any custom I have had. It did however look pretty good under the borescope even after about 800 rounds out of that firebreather.

Lerch had one identical to mine and his did not seem to foul as bad so maybe I just had on that was prone to Cu fouling.
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  #3  
Old 08-14-2008, 10:30 AM
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Re: 3 groove Barrels

Kirby Allen has used them quite a bit I believe, maybe he will respond.
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Old 08-14-2008, 10:43 AM
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Re: 3 groove Barrels

Pretty much what BJ said, but mine, the same barrel as his most probably, doesn't foul much at all.

The fast twist is is real hard on bullets. After 400 rounds the Wildcat 195s started coming apart. Which seems typical for about 50% of Lijlas of this design. The 169s w/the Corbin jackets do very well but are unavailable any longer.:mad:

Berger 150 VLDs twist like wet towels when jumped into the rifling. (per Kirby). I shot a bunch of them the other day. @ 35/3600 they were falling 5.5 MOA below the Nosler Ballistic Tips @ 200. When jammed they shot around 1 MOA. When jumped 20 thou they shot 9 MOA @ 200.

Accuracy is way better than I can shoot. The rifle more than meets the expected 1/2 MOA.

Velocity seems hard to come by in mine. 3050 Max w/ 195s. 3300 w/169.5s 3600 with 140s and 3500/3600 with 150 Nosler BTs. All using US 869.

I've found that 17% less of IMR 7828SSC gives the same pressure and velocity as US-869, w/the 140/150 weight bullets with much better ES/SDs.

Barrel life seems very good. I had it bore scoped, the smith estimated the number of rounds through it was about 1/2 of actual.

Would I do another one? Heck, I have no idea. Things have been learned in the last couple of years, and I go with current recommendations.
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  #5  
Old 08-14-2008, 12:01 PM
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Re: 3 groove Barrels

I have a 3 groove Lilja on my 270 AM and love it. Got another Lilja 3 groove in .277 #3 10 twist for another build in the future. Would definitely buy more.

No fouling issues, except carbon. I actually prefer 3 and 4 groove barrels, or 5R barrels.
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  #6  
Old 08-14-2008, 12:07 PM
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Re: 3 groove Barrels

Thanks guys !!!

This will be for a very high velocity .224 (4200 to 4400 ft/sec)
and will be a 1 in 15 twist.

I hope this is not a mistake !!

Any more comments will be good.

Thanks again
J E CUSTOM
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  #7  
Old 08-14-2008, 12:31 PM
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Re: 3 groove Barrels

Quote:
Originally Posted by J E Custom View Post
Thanks guys !!!

This will be for a very high velocity .224 (4200 to 4400 ft/sec)
and will be a 1 in 15 twist.

I hope this is not a mistake !!

Any more comments will be good.

Thanks again
J E CUSTOM


Seems to me that that a Rock Creek 5R would be though to beat for your project.
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