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30BR for 300 m/y with some constrains

Hi Josh, appreciate, very useful!! Berger 115; 17 twist, VW N130 - is my current plan, actually.

Tuner shouldn't be a problem, I guess. In worst case I can engage somebody hier in Germany with CNC expertise. Any particular recommendations regarding manufacturer or specific design?
 
Currently I am using the tuner made by my gunsmith, Dave Short. I have had good results from the Bucky's Tuner in the past. @gunsandgunsmithing (Mike Ezell) tuner has a large following as well (I cannot comment on it personally as I haven't used one).

I personally feel that a tuner needs some type of damping property to really be effective. All of the ones I mentioned do that.
 
I'm asking because I don't know...is a 30br really better than a 6br at 300yrds? I have zero experience with the 30br, I always kinda thought they were uber accurate and slow and not very forgiving in the wind?
 
as for me, even if the accuracy of 30BR is at least comparable with 6BR, advantages of 30br in my particular case could be:

- bullet diameter - increase chances in score target discipline. A touched ring counts.
- apparently significantly longer barrel life. Rebarelling can take months and months in Germany, is quite expensive and painful procedure with a lot of constrains and regulations
 
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I made and used a 30BR rifle to use from 100 to 300 meters matches, but my intention was to use it with heavy bullets not normally used in 30BR: 135 to 168grs bullets.

I really liked it because of mild recoil and good velocity of around 2.500 fps with 155grs. that, in my view, were the best bullets for 300 meters.

The accuracy was very good, averaging 0,5 MOA (minimum of 5 groups of 5 shots at 100 meters), easily making it within the 10 ring (10 centimeters at 300 meters).

Saying that, it is nowhere near the performance of the 6BR. The 6BR is a much better performer at 300 meters when comparing with the bullets I used (135 to 168gr) and I think that even if I had used lighter bullets, with their higher speed, it was not enough to compensate the much higher wind drift you get with the .308 bullets, comparing with the 6mm bullets.

The 6BR at 300 meters is much more accurate than the 30BR mainly because of the higher BC of the 6mm Bullets and much lower recoil (better for the shooter in the long run).

The real down side of the 6BR is that the barrel life is much shorter than a 30BR barrel.

This is my experience with both calibers. Hope it helps.

LRCampos.
 
First post here - all advises are highly welcome!

I'm from Germany and looking for a benchrest rifle for 300 meter target score discipline.

A possible candidate is a 30BR. But the issue is, that according to the German C.I.P regulation, a minimum freebore should be at least .157" (G-h = 4mm)

https://www.cip-bobp.org/homologation/uploads/tdcc/tab-i/30-br-ge.pdf

Therefore, the nice 112-118 BIB bullets, Robinett Reamer and 17 - 18 twist will probably not work here...

So here are the questions:
  1. What bullets and what twist would you take?
  2. Is that even worth to try under these circumstances?
  3. If not - what could be an alternative in .308 boltface?

Cheers
I have competed and won with a 30BR at 300 and 500 yard mates, as I have with a 6PPC also, if conditions are favorable. If your committed to 1 rifle though for 300 I would highly recommend a 30 x 47 over the 30 BR. It will be far superior to the 30 BR in the wind.
 
I would second what Jeff just said. I just built a 30x47 and have been very happy with it. I think it's an easy round to load for and you can get a 118 gr bullet going 3300 plus without pushing the case hard at all.
 
I have a 308 running a 17 twist 27.5" barrel. Zero freebore chamber (was done using a 260 reamer for the body, then a 30 cal neck reamer). It pushes 118gr BIBs at 3500fps using palma brass with outstanding accuracy and mild recoil I am yet to stretch its legs, but I expect on still days it will perform well out to 600 yards
 
Why not use a 6.5BR or a 7BR? A 7 seems like it might be right in the middle as far as wind drift and recoil.
 

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