I am needing someone to help persuade me into which caliber to chamber my kreiger 31" 6mm, 7.5 twist barrel for. This build is a light gun for 600yd but mostly 1000 yd benchrest matches. Part of me wants to be different and build a 6-6.5-47 bc of good parent case, brass, dies and improved ballistics over 6 dasher or 6 br improved which would be my next choices simply due to winning record and inherit accuracy and barrel life. So give me caliber choice and reasoning behind your choice. Thanks for help in advance.
Which caliber would u choose and why?
- Thread starter Jw284
- Start date
XC !! 
Fits the bill nicely. Very accurate and efficient. I don't think there is just one round that is any better than another but I am tremendously happy with the xc chambering. Almost boring for load development due to it's immediate accuracy. I shoot 105gr Hunting VLD's .025 off lands over H4350, lit with a CCI 200 primer. A 38 gr charge put me at 3080fps and it just kept going from there. It easily went 3150 with no pressure but I was velocity limited for steel shooting so I stayed with the 38gr node.
Dan
Fits the bill nicely. Very accurate and efficient. I don't think there is just one round that is any better than another but I am tremendously happy with the xc chambering. Almost boring for load development due to it's immediate accuracy. I shoot 105gr Hunting VLD's .025 off lands over H4350, lit with a CCI 200 primer. A 38 gr charge put me at 3080fps and it just kept going from there. It easily went 3150 with no pressure but I was velocity limited for steel shooting so I stayed with the 38gr node.Dan
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6 comp match hands down. I ain't got a 6xc or a dasher but damn the comp pushes a 105 at 3200 really fricken easy and roughly 4000 round of barrel life with incredible accuracy. Seems like a no brainer to me but like I said I ain't got a xc or dasher but why do I need that crap when I got my comp match. Everybody I talk to says the comp will out do the XC but the dasher is pretty incredible from what I read. I don't know but my opinion I guess. I probably won't have another 6mm other than the 6 comp now. The 47 lapua case is awesome as all get out but I'm a 6comp man. Easy choice for me. Best of luck.
Have you thought of forming 6XC brass from the 6.5 x 47 Lapua. You would get the accuracy of the XC and AWESOME brass with S/R primer pockets! You could run the pressures up with little worry of hurting the brass. I believe you could EASILY top 3000 and probably past 3050 with the 115 DTACs with a .620B.C.! I THINK (not sure) but I would bet you could run VV N560 in the case with the 115's and really get those DTACs s-c-r-e-a-m-i-n-g!
swd
Silver $$ Contributor
I'm shooting a 6x47L Improved. The shoulder is blown forward to Dasher shoulder and neck specs. It easily pushes the new DTAC's to almost 3200 with H4350 or RL17. Still playing with loads, but I shot it at 600 F a couple weeks ago at a mild 3020 and came in second. At 3100 on paper it performs exactly like a 284 with a 180 Berger at 1K but I haven't had time to take it to 1K yet.
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swd
Silver $$ Contributor
Also just because it's capable of incredible speeds with 115's doesn't mean you'll get any barrel life up there! I suspect pushing 3200 it will make a 6.5x284 seem like it has great barrel life. The 47 case is stupid strong and almost handles pressure a little too well. Back it down to 3000-3100 and enjoy 7mm ballistics. My barrel sped up in match and I probably put 50 rounds through it at 3180-3200 and it showed a pretty fair amount of fire cracking after that match. I'm going to shoot one more match with it in a couple weeks and then do a scheduled matainance set back. Round count at that time will be around 450.
If you are planning the rifle for benchrest competition go with the Dasher and save yourself a lot of headaches.
I feel the best cartridge represents the best balance.
IMO, 6XC is not as accurate as 6Dasher, and adding any more powder to the 6Dasher will also subtract accurate barrel life.
The 4k barrel life, from H1000 in 6CM, should be taken w/resp to ACCURATE barrel life. And I doubt the cartridge, with H1000, will ever prove(beyond anomaly) to be accurate enough to begin, in IBS BR.
I believe H1000 and it's resulting pressure peak (in 24cal), are too slow.
With the dasher, you get just the right capacity, to fill the case with faster powder, running a little more but viable pressure, for the best accuracy node, with very good bullets. It's a balance conducive to easy precision, and I've yet to hear of a 6Dasher that wouldn't shoot well.
I suspect the 6.5x47L/130s will do alright for the same reasons(it's balance).
And to go all crazy,, I'm calling 260AI/140s, in Lapua brass, the next rock star!
IMO, 6XC is not as accurate as 6Dasher, and adding any more powder to the 6Dasher will also subtract accurate barrel life.
The 4k barrel life, from H1000 in 6CM, should be taken w/resp to ACCURATE barrel life. And I doubt the cartridge, with H1000, will ever prove(beyond anomaly) to be accurate enough to begin, in IBS BR.
I believe H1000 and it's resulting pressure peak (in 24cal), are too slow.
With the dasher, you get just the right capacity, to fill the case with faster powder, running a little more but viable pressure, for the best accuracy node, with very good bullets. It's a balance conducive to easy precision, and I've yet to hear of a 6Dasher that wouldn't shoot well.
I suspect the 6.5x47L/130s will do alright for the same reasons(it's balance).
And to go all crazy,, I'm calling 260AI/140s, in Lapua brass, the next rock star!
Several have asked me about the rifle , load. etc., so here are the particulars:
The rifle is a BAT model B with Terry Leonard BR stock and Valdada 36X scope. I got the rifle used from Joe Krupa who was not the original owner. The barrel is a Brux 8-twist (28" long) that was chambered in 6mm Dasher by COL Billy Stevens. The load was 32.8 gr. Varget/Bart's 105g rebated BT seated to jump about .005/ ignited by Fed 205 primers. The velocity is about 2960 fps.
The rifle is a BAT model B with Terry Leonard BR stock and Valdada 36X scope. I got the rifle used from Joe Krupa who was not the original owner. The barrel is a Brux 8-twist (28" long) that was chambered in 6mm Dasher by COL Billy Stevens. The load was 32.8 gr. Varget/Bart's 105g rebated BT seated to jump about .005/ ignited by Fed 205 primers. The velocity is about 2960 fps.
ab_bentley
I fix stuff, sometimes....
Dasher. After using it for a few hundred rounds I must say, it's a step up from the 6br.
I'm using a 105 @ 3100 even with a single digit ES.
Adam
I'm using a 105 @ 3100 even with a single digit ES.
Adam
The Dasher and 300 WSM PRETTY much dominate the 1000 yard BR game. They win almost all the matches, win the aggregates and set most the records. There is a reason for this. Both easy to tune and stay there. As a whole they are more accurate. The downside of the 300 WSM is recoil. Very few 6 BR and 6.5x47's. The difference in velocity been the 6 BR and Dasher makes a big difference at 1000. I am not talking one target but aggregates for the season. Don't see too many 6.5x47 at 1000 yard BR. I see up to a hundred guns shoot every other week and am basing opinions on what I see. It has been this way for a few years now. Matt
The records set by the Dasher speak for themselves. The name has nothing to do with its accuracy. The 6.5 x 47 is a great cartridge and it would be my third choice for 600yd. shooting behind the 6 Dasher and 6 BRX. I don't shoot 1000 yds, but if I did I would use the Dasher in light conditions and the .284 (Win or Shehane) for windy days. Good shooting...James
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Grimstod
Machinist, Designer, and Shooter.
The Dasher fans always come out of the closets.
If your want dasher performance then try a 6BRX. Better feeding and lab tests demonstrate that the 30d should has lower ES. BRX actually wins a higher percentage of matches then the dasher.
Oh my are you guys going to hate me for saying this. Lol and i am going to repeat what i said earlier. The Dasher has no accuracy advantage over any other 6BR bariant. Its just the most popular version because it has a cool sounding name.
If your want dasher performance then try a 6BRX. Better feeding and lab tests demonstrate that the 30d should has lower ES. BRX actually wins a higher percentage of matches then the dasher.
Oh my are you guys going to hate me for saying this. Lol and i am going to repeat what i said earlier. The Dasher has no accuracy advantage over any other 6BR bariant. Its just the most popular version because it has a cool sounding name.
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