stingerjg Posted July 31, 2004 Share Posted July 31, 2004 i just got some new bullets from Zero. They are 125gr JHP. I have been shooting Armscore 124gr FMJ over 7.9gr VV N350. How much, if at all, should i back off the charge weight. The armscore bullets are .355" and the Zero's are .356". Im thinking about .2 to .3 gr less to start. The N350 works better when the rounds are loaded hot. I just dont know how much more pressure will be involved with shooting a round that is .001" larger in diameter. Link to comment Share on other sites More sharing options...
warpspeed Posted July 31, 2004 Share Posted July 31, 2004 I've used the 125 zero jhps over 7.3 gr N350 - 1.170 oal in 9x19. I get 1330 - 1350 fps out of a 5" barrel. I've gotten similar results from 124 gr MG jhp's. What kinda OAL are you running 7.9 gr with? Link to comment Share on other sites More sharing options...
stingerjg Posted July 31, 2004 Author Share Posted July 31, 2004 im running mine at 1.258"OAL. Its a 38SC Link to comment Share on other sites More sharing options...
Singlestack Posted July 31, 2004 Share Posted July 31, 2004 7.9 seems kinda low for VV350 and a 125g zero. I use 8.6 with a 125g JHP zero @ 1.25 oal. 38 Super. Link to comment Share on other sites More sharing options...
stingerjg Posted July 31, 2004 Author Share Posted July 31, 2004 i went and double checked my records and thats what im loading them at. 7.9gr VV N350 124gr Armscore FMJ bullet, starline 38SC brass, WSR primers, 1.258"OAl, 5" 1-32 twist Schumann barrel, Brazos comp, 1425fps average, 177.63PF Link to comment Share on other sites More sharing options...
shred Posted July 31, 2004 Share Posted July 31, 2004 I used 7.8 N350 and a 124 or 125 @1.240" in 38 Supercomp in my 5" non-ported STI for a 170 PF. I need to run 8 or so in the ported shorty. SS must have too many holes in his barrel or something. Link to comment Share on other sites More sharing options...
Singlestack Posted July 31, 2004 Share Posted July 31, 2004 Ahhhh yes, the Holy barrel. Link to comment Share on other sites More sharing options...
blackdragon Posted August 1, 2004 Share Posted August 1, 2004 Why did you switc bullets? Ivan SCS Vegas Link to comment Share on other sites More sharing options...
stingerjg Posted August 1, 2004 Author Share Posted August 1, 2004 The Armscore bullets gave me a really inconsitant OAL when loaded. I was loading for 1.258" OAL. I would get anywhere between 1.265" to 1.242"OAL. this would be fine for a 45 or 9mm to be that much off, but with 38SC loaded at 177-178PF this isnt really safe. I tried a couple of different seating dies to try to remedy the problem, i even spent the big $$ for a Redding Pro seating die. to no avail. i narrowed it down to the shape of the bullets being nonuniform from bullet to bullet. The armscore bullet will be my new bullet for loading 9mm. Link to comment Share on other sites More sharing options...
blackdragon Posted August 3, 2004 Share Posted August 3, 2004 I try to load my 38 sc to 2.450 oal it does fluctuate some, but for the cost of bullets I will deal with it, although I am partial to Armscor, maybe an inconstitant batch? It does happen, I would'nt give up on them. See Ya Ivan SCS Vegas Link to comment Share on other sites More sharing options...
stingerjg Posted August 7, 2004 Author Share Posted August 7, 2004 I loaded up 20 rounds yesterday to chrono. I loaded them at 1.250"OAL over 7.7gr VV N350. They were ALOT more consistant in length than the Armscore's were, variation of .002" in OAL. That makes me happy. Oh well off to the range for some chrono time. I'll post back with my results from chrono. Link to comment Share on other sites More sharing options...
stingerjg Posted August 7, 2004 Author Share Posted August 7, 2004 just got back from the range. Looks like im gonna need to do some more load development. Im thinking that cause the new bullet (.561" long) compared to the old bullet (.597" long), made my PF drop. I did back off the powder charge from 7.9gr to 7.7gr N350. I chrono'd them at 1334fps/ 166PF. Ill kick the charge up to 7.9 or 8.0gr to see where im at. I am aware that i only need to get 165PF for major, but the gun seems to run alot better with the N350 at around 157-180PF Link to comment Share on other sites More sharing options...
Eye Cutter Posted August 31, 2004 Share Posted August 31, 2004 the armscor fmj heads i used before for 9mm were also inconsistent. the shapes and lengths of the slugs were irregular. i think they've worked out this problem now as the new heads i got (box of 2000) are more consistent and the weights (declared 124 gr) do not vary so much (123-125gr) Link to comment Share on other sites More sharing options...
Eye Cutter Posted August 31, 2004 Share Posted August 31, 2004 i've also been using the sellier & bellot fmj heads in 9mm, and their weights and shapes are very uniform. the 124gr declared weights all weigh 122 gr, though Link to comment Share on other sites More sharing options...
blackdragon Posted August 31, 2004 Share Posted August 31, 2004 We are currently prototyping a 125g jacketed soft point 9MM bullet, It has a solid back to stop the leading of the comp. I am planing on shooting them at the Nats This year. Ivan Armscor Link to comment Share on other sites More sharing options...
mcoliver Posted September 1, 2004 Share Posted September 1, 2004 Ivan, would you know if that prototype will eventually be available here in the Philippines? Thanks. Link to comment Share on other sites More sharing options...
blackdragon Posted September 1, 2004 Share Posted September 1, 2004 I don't see why not, That is where they are made! Ivan Armscor Link to comment Share on other sites More sharing options...
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