Max It Posted June 13, 2014 Share Posted June 13, 2014 hi Ya Guys, I loaded some Auto Comp behind 124gn plated bullets; they shot low at 20 yards, I am using max allowed in Hodg book at 5.3gn, is more better or worse? much obliged, Link to comment Share on other sites More sharing options...
Therealkoop Posted June 13, 2014 Share Posted June 13, 2014 Faster = lower in my experience. The slower the projectile the higher the barrel lifts before it exits. Link to comment Share on other sites More sharing options...
Max It Posted June 13, 2014 Author Share Posted June 13, 2014 hi Koop, makes sense to me; I will load a few at 4.8gn and try that. in fact where I bought it Phoenix they told me the load was 3.7g but I saw that as too low. Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted June 13, 2014 Share Posted June 13, 2014 Depends on what gun your shooting, your springs and what you're doing with the ammo - you might be able to go to 3.5. It won't make minor, but if you don't need the PF, you can go as low as your springs allow. Link to comment Share on other sites More sharing options...
Max It Posted June 13, 2014 Author Share Posted June 13, 2014 hi Jack, I don't need to make PF, but I need to knock over 8" steel plates; some attached to a Texas Star. but with your advise and Koop's I am going lower, even to 3.8gn. I will take it to the indoor range and try it on paper. Link to comment Share on other sites More sharing options...
jmbaccolyte Posted June 14, 2014 Share Posted June 14, 2014 When working up a new load, I prefer to start low and work up. Link to comment Share on other sites More sharing options...
Max It Posted June 14, 2014 Author Share Posted June 14, 2014 HI Ya. after 4 years of reloading, casting, and smelting I still don't know why I start low and work up?? am I worried about pressure? right now I am concerned that 124gn 9mm doesn't easily knock down texas stars like 147gn, I have 2000 to go thru. either gun: CZ75 or XD9 Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted June 14, 2014 Share Posted June 14, 2014 I don't know why I start low and work up?? am I worried about pressure? Exactly. No reason to load up to PF 155, and then work backwards to 135 - and it's dangerous. Start at PF 120 and work up to PF135. It's safer. Link to comment Share on other sites More sharing options...
rtp Posted June 15, 2014 Share Posted June 15, 2014 HI Ya. after 4 years of reloading, casting, and smelting I still don't know why I start low and work up?? am I worried about pressure? right now I am concerned that 124gn 9mm doesn't easily knock down texas stars like 147gn, I have 2000 to go thru. either gun: CZ75 or XD9 Different guns (barrels) will affect PF and pressure, as well as your OAL. That CZ won't let most bullets be loaded long, if loaded correctly ( http://www.czfirearms.us/index.php?topic=34225.msg189131#msg189131 ), and the shorter OAL will increase pressures and velocity. I have a barely above min published load that approaches max published load velocities due to an OAL of 1.065" (MG 124gr JHPs, WSF, for CZ and PPQ). Why would you willingly be starting on the 'potentially dangerous for you and your guns' end of loads? Do you have a chrono? Link to comment Share on other sites More sharing options...
Max It Posted June 15, 2014 Author Share Posted June 15, 2014 (edited) Hi Ya, nope no chrono, and the local range is indoor. so only chance to chrono is outdoor at a match, if I ask my buddy to bring his. I will check length and take that into consideration. the reason for loading full is to knock over steel plates. I tried the loads yesterday, 4.3 to 4.8gn cycle well, with no noticeable drop at 20 yards so I am going with that. Especially now that you pointed out the excessive pressure issue: hodgdon book gives oal at 1.09" on load data allowing 5.3gn of Auto Comp, since I am loading 1.16" oal I am well within the safe area. Much obliged, Edited June 15, 2014 by Max It Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted June 15, 2014 Share Posted June 15, 2014 no chrono Well worth the $70. Link to comment Share on other sites More sharing options...
Max It Posted June 15, 2014 Author Share Posted June 15, 2014 wow, $70. ! I see midwayusa at 115.? and others hovering around that price too. what I just realized is that with my oal I can now shorten it closer to the Hodgdon book. instead of Chrony I check the primers for bulge after shooting (old school ) much obliged, Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted June 15, 2014 Share Posted June 15, 2014 wow, $70. ! I see midwayusa at $115 I've been using a Chrony ($70) for years - great little tool. The cost of 3-4 boxes of ammo, and now I KNOW how fast my bullets are flying:) Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now