TerryYu Posted December 29, 2013 Share Posted December 29, 2013 Before I go chrono this load, can anyone chime as to the safety of this load? I know it's getting pretty close to the limit as far as powder and OAL choice but I'm hoping someone has already loaded this up before! I'll be shooting it out of a M&P Pro and a CZ 75 Shadow. Link to comment Share on other sites More sharing options...
frankie Posted December 29, 2013 Share Posted December 29, 2013 don't trust any data that's not from a manual. start light and work your way up. safety, safety, safety. Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted December 29, 2013 Share Posted December 29, 2013 What Frankie said. Always start LOW and work up slowly with a chrono. Too many possible problems with starting high - OAL, accurate measuring of powder, your chamber, etc etc. Be careful .... Link to comment Share on other sites More sharing options...
TerryYu Posted December 29, 2013 Author Share Posted December 29, 2013 Thanks. I'm starting out with 3.7, 4.0, 4.2, and then 4.5. Hopefully I'll get to PF before I hit pressure. Link to comment Share on other sites More sharing options...
DougCarden Posted December 29, 2013 Share Posted December 29, 2013 It is gonna be on the higher sign of velocity due to the lead bullet but you should be fine...seriously. DougC Link to comment Share on other sites More sharing options...
TerryYu Posted December 29, 2013 Author Share Posted December 29, 2013 Thanks! Just came back from the range with my chrono data, hope this helps anyone considering these bullets from Penn Bullets 115gr Penn Bullet SWCBB @ 1.06 COAL http://www.pennbullets.com/9mm/9mmswcbb.html S&W M&P Pro 5" 3.7gr N320 Low- 1079 High- 1097 Avg- 1086 ES- 18.2 SD- 7.68 n- 5 pf- 125 4.0gr N320 Low- 1082 High- 1163 Avg- 1127 ES- 81 SD- 40.5 n- 3 (chrono didn't pick up two shots) pf- 129 4.3gr N320 Low- 1194 High- 1216 Avg- 1205 ES- 23 SD- 9 n- 5 pf- 138 CZ 75 Shadow 3.7gr N320 Low- 1062 High- 1083 Avg- 1072 ES- 21.7 SD- 10.3 n- 4 pf- 123 4.0gr N320 Low- 1120 High- 1145 Avg- 1134 ES- 25.8 SD- 10.7 n- 5 pf-130 4.3gr N320 Low- 1173 High- 1200 Avg- 1190 ES- 27.3 SD- 11.4 n- 5 pf- 137 Temperature - 52F Barometer - 30.09in Hg Winds - 15 mph (shielded behind berm) So as you can see, I didn't have to touch 4.5gr to make PF. Didn't see any pressure signs at 4.3, but didn't feel like tempting fate by shooting the higher load as I had already made PF and then some. I'll be going back with the 4.0gr load for accuracy testing in a day or two, it looks promising though, the round is very light in the gun. I just found out that my match ammo had been chrono-ing in at 140pf, so this load is like taking a vacation! Link to comment Share on other sites More sharing options...
mknpwr Posted January 3, 2014 Share Posted January 3, 2014 Hey Terry, enjoying life out there in the Air Force? Miss having you around here at PGC events. Todd Link to comment Share on other sites More sharing options...
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