John T wrote:
"Load From A Disk" spec sheet for the 300 RCM tells me that the engine room/powder chamber wall is 0.0225 at the Web and 0.0112 at the Shoulder. Thicknesses for the 7 SAUM are 0.0404 and 0.0202. Based on that information, the capacity of the powder chamber of the 6.5 PRC is larger than that of the 7 SAUM by more than 5%.
Shobby, John, Frank and anyone who has loaded the 6.5 PRC and the 7 SAUM, what do you say?
IF LFAD and my calculations are correct, Shobby, you and your gunny could make a very nice 7mm, with at least 3% more powder chamber capacity than the SAUM and with a 0.315 neck.
Regards,
John T.
9.1.23
The 20thou of larger body at the shoulder of the SAUM is where its greater case capacity comes from but actual capacity between the two is very close, closer than most would think....