JWP475,
I measured when I worked up the 460 Rowland loads in May 2000,
I will do it again 14.5 years later right now.
See if I can do a better job in my 60s than in my 40s
Web thickness:
Starline 45 super 0.187"
Starline 45 +P 0.164"
Starline 45 auto 0.164"
RP 45 auto 0.187"
WCC 92 0.183"
WCC 91 match 0.178"
TZZ 87 0.175"
WC 93 0.180"
IMI 45acp 0.176"
TZZ 92 0.177"
TZZ 87 0.183"
WW 45 auto 0.171"
WCC 87 match 0.177"
Federal 45 auto 0.155"
WCC match 97 0.176"
PMC 45 auto 0.173"
TZZ 92 match 0.187"
WCC 95 0.177"
But I can tell you this... Take the worst 45acp brass. Work it up to brass failure or short brass life in a strong rifle, like I did with a 98 Mauser. Back off a safety margin in the powder charge to assure long brass life under a wide range of conditions. You still have a 45acp load that has too much recoil [for a semi handgun with typical slide mass] and is a step above 460 Rowland published loads.
0) 45 acp....................... 185 gr 07.6 gr AA#5 jams w/stock Patriot spring
1) 45 acp........................185 gr 10.2 gr AA#5 1100 fps 18,000psi
2) 45 acp +P...................185 gr 10.8 gr AA#5 1200 fps 21,700 psi
3) 45 Super.....................185 gr 12.4 gr AA#5 1312 fps 28,000 cup
4) 460 Rowland............... 185 gr 14.5 gr AA#5 1500 fps 38,800 cup
5) Easy extraction ............185 gr 15.0 gr AA#5 *rifle
6) Case starts to stretch....185 gr 15.2 gr AA#5 *rifle
7) difficult extraction ........185 gr 16.0 gr AA#5 *rifle
8) primer falls out ............185 gr 16.5 gr AA#5 *rifle
