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Old July 12, 2001, 07:41 PM   #4
Clark
Senior Member
 
Join Date: December 4, 1999
Location: WA, the ever blue state
Posts: 4,678
PO 13s have better supported chambers than Colt Commanders and have the same volume for recoil spring assemblies.

I can get more power out of my Commander without case bulge than I can absorb with an awsome set of springs. It has reached the 45 Super level, so far. Read the 45 Super articles at:
http://www.realguns.com/archives/newarc.htm

I have a number of 45acp type firearms and I have had to work up the loads while looking for pressure signs in each separately.

1.275" OAL
0) 45 acp....................... 185 gr 7.6 gr AA#5 jams stock recoil 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 1550 fps 20 oz Patriot
6) Case starts to stretch 185 gr 15.2 gr AA#5 1770 fps 15 lb 98 Mauser
7) difficult extraction ...... 185 gr 16.0 gr AA#5 1850 fps 15 lb 98 Mauser
8) primer falls out .......... 185 gr 16.5 gr AA#5 1900 fps 15 lb 98 Mauser
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