9MM load for IDPA
- Thread starter LouF
- Start date
twoicebergs
Regular
Yes. I have found that 4.6gn give a typical PF of 138 depending on the gun. I use 4.3gn for 124FMJRN and it typically gives me about 130 or a bit less again, depending on the gun barrel. This is using 5" barrels. You may see a slight drop with a shorter or loose barrel. Some guns do better with different loads for accuracy (POA and POI). Same goes for crimp. Ensure you practice (or at least sight it in) and run the event with the same loads.
twoicebergs
Regular
That data is based on a hollow bullet. You will find different data if you use 125gn lead RN which is closer to the 124gn FMJRN . In any case, you need a chrono. The 3.9 of W231 powder produced a sub 120 PF round.
Data I collected using 124gn CamPro FMJRN bullets, Win 231 powder and CCI small pistol primers.
3.9gn = Avg velocity 946 ft/sec PF 117. I didn't test this further, but I use this and a smaller load for my wife and guests to shoot.
4.3gn = Avg velocity 1023 ft/sec PF 127. I tested another batch in 2 different guns with Avg velocities of 1046 and (PF 129) and 1075 ft/sec (PF 133).
4.6gn = Avg velocity of 1125 and 1145 ft/sec (PFs of 139.5 and 142).
My scales may be off by 0.1gn. All the data I provided is what I experienced with my reloading equipment, my handguns and my CED M2 Chrono. Your results may vary.
Data I collected using 124gn CamPro FMJRN bullets, Win 231 powder and CCI small pistol primers.
3.9gn = Avg velocity 946 ft/sec PF 117. I didn't test this further, but I use this and a smaller load for my wife and guests to shoot.
4.3gn = Avg velocity 1023 ft/sec PF 127. I tested another batch in 2 different guns with Avg velocities of 1046 and (PF 129) and 1075 ft/sec (PF 133).
4.6gn = Avg velocity of 1125 and 1145 ft/sec (PFs of 139.5 and 142).
My scales may be off by 0.1gn. All the data I provided is what I experienced with my reloading equipment, my handguns and my CED M2 Chrono. Your results may vary.
This is exactly what I wanted!You didn't specify the firearm used but the recipe is exactly what I'm going to use(bullets,powder,primer)I had a chronograph but got shot last year by my friend and hasn't been replaced yet.From your data staying around 4.3 to 4.4 grs of 231 and the CamPro 124 gr bullet should be in the ball park.
Full jacketed tends to run a bit slower than a plated. Actually they run slower than cast lead bullets. But all the information around on plated bullets says that the thin plating makes them behave more like cast bullets than heavy jacketed bullets.
So while it will require chrono testing at some point to ensure you're meeting the power factor I'd say that you SHOULD be OK with the Campro bullets with around 4.3gns. But you may need to bump up to the full 4.4 if the chrono testing eventually shows an issue.
So while it will require chrono testing at some point to ensure you're meeting the power factor I'd say that you SHOULD be OK with the Campro bullets with around 4.3gns. But you may need to bump up to the full 4.4 if the chrono testing eventually shows an issue.
I'll probably break down and buy another chrono this summer.Tired of hinting to my acquaintance (notice that I didn't say friend here) about the casualty he produced and it's replacement.I will not lend it out again.I'll probably stick with CamPro plated . Even thou cast are cheaper I find they are too unpredictable in antimony mixture and mess up my barrels. I'm on a CZ forum and the guys over there say to keep the OAL a little smaller when seating.This increases pressure a tad but helps keep the bullet in it's correct axis better when cycling up the ramp.The OAL standard for 9mm is 1.150 and I'll do a OAL of 1.130 and 4.1 grs of 231 then another group with OAL of 1.140 and 4.3 grs and see what goes on.
I'm a fellow CZ'er. It depends on the actual bullet profile but I think you'll find that you need to go a LOT shorter. The 125gn round nose plated Berry bullets I've used needed to be set to an OAL of 1.10 to 1.11. Otherwise you'll find that the ogive shape sticks on the rifling leade and the slide doesn't close.
The 1.15 is pretty much a SAMMI max rather than a "standard". Commercial ammo comes loaded to more like the 1.10 to 1.12 so it fits in guns like our CZ's.
The 1.15 is pretty much a SAMMI max rather than a "standard". Commercial ammo comes loaded to more like the 1.10 to 1.12 so it fits in guns like our CZ's.
