30br
- Thread starter JEC
- Start date
In this barrel, I have just tried the 115 Berger FB, jambed .013 ... 33.6gr H4198, CCI-BR4 primers. The other barrel I have likes the 110 Bergers best with 33.8grs H4198. I shot over a hundred groups with 110 / 115 /125 Bergers that gave me a 0.3" agg. Velocity on the 115's was 2960.
I have a 30BR reamer that I haven't gotten around to using yet. I bought a Savage Precision Carbine on a whim and was gonna convert that but the OEM rifle shoots so well I decided to leave it alone for the time being.
I really like the idea of the 30BR. Interestingly your velocities are not a lot less than my 308 shooting 125 gr bullets and the 308 is burning a whole lot more powder in the process.
I really like the idea of the 30BR. Interestingly your velocities are not a lot less than my 308 shooting 125 gr bullets and the 308 is burning a whole lot more powder in the process.
Keep in mind that OP looks to have a fairly long barrel on that rifle and your 308 PC has only 20" of tube.
Mark
The 2960fps is with 115 BERGERS using 33.8gr 4198 out of a 24" barrel. I had the new barrel cut to 22" as reports from 30BR shooters say there is little advantage to a longer barrel...and little difference between velocities from 21 - 24" barrels. The efficiency is achieved because of the favorable capacity/bore ratio. Powder gets burned pretty quick...and it uses a much faster powder than the 308. The early 30BR guys are saying their barrels are still competative after 7000 rounds.
Fair point but my 308 is burning 45gr of powder which is a whole lot more than the ca 33gr the OP is reporting. The 30BR seems like a very efficient case. Can't wait to try it.
