The Firing Line Forums - View Single Post - 30 Gibbs, 30-06 JDJ?

Scorch · January 14, 2009, 12:06 PM

Just trying to draw a parallel for you here. I saw the chronograph results of a 7mm Gibbs compared to a 280 Rem, and the gain was about 120 fps (4%+/-) using about 15% more powder. You could gain the same amount of velocity by putting a longer barrel on the rifle, as you are already considering. If the Gibbs really turns you on, go for it, but with today's powders you can almost match most of the improved cartridges by just finding the right powder.

As far as forming the cases, yes, you could use Whelen brass, but you still need to fireform the brass with reduced loads. Or you could form the shoulder like sadsack suggested and fireform. Same results, in the end.

January 14, 2009, 12:06 PM	#3
Scorch Senior Member Join Date: February 13, 2006 Location: Washington state Posts: 15,248	Just trying to draw a parallel for you here. I saw the chronograph results of a 7mm Gibbs compared to a 280 Rem, and the gain was about 120 fps (4%+/-) using about 15% more powder. You could gain the same amount of velocity by putting a longer barrel on the rifle, as you are already considering. If the Gibbs really turns you on, go for it, but with today's powders you can almost match most of the improved cartridges by just finding the right powder. As far as forming the cases, yes, you could use Whelen brass, but you still need to fireform the brass with reduced loads. Or you could form the shoulder like sadsack suggested and fireform. Same results, in the end. __________________ Never try to educate someone who resists knowledge at all costs. But what do I know? Summit Arms Services Last edited by Scorch; January 14, 2009 at 12:11 PM.