Re: Compressed Load?
I am glad I asked this question before I just looked at Hodgdon's website and went blasting away. I have looked at two Barnes manuals, one said 76.0 grains as max and the other said 75.5. I emailed Barnes, and this is the response I got. "
I just talked to the guys that shoot the data. I hope I can say this aseloquent as they put it. They said from BRM#3 to BRM#4 the entire way that they shot data changed. For BRM#3 they used to shoot a charge then measure the head stamp for expansion. For BRM#4 they used a strain gage to measure barrel expansion, which was a more accurate reading. For BRM#5 they are
using a conformal transducer that can read internal chamber pressures which is more accurate still. Each time they get more accurate reading on
pressure combined with the different bullets, different barrel, different powder lot#'s and other components all add up to drastic changes.
72 to 76 grains seems like allot of variance. I just ordered a chronograph and am going to wait to shoot it through there. Once I get around 3600, if my groups are decent, I'm gonna call it good.