cjuve
Well-Known Member
I am in the process of getting a couple reamers drawn up and was wondering what everyone was using for free bore for the 230 berger hybrid targets. The calibers in question are 30-338 Norma improved 33 degree, 300 RUM, 30-338 Lapua imp. 40 degree. All of my measurements and calculations put the correct free bore at approx. .225-.230 depending on the neck length required. After dealing with short throated magnums before a little extra free bore does not bother me and is actually preferred. If anyone has any suggestions it would be appreciated.