a matt Posted February 29, 2012 Share Posted February 29, 2012 (edited) I just received some Montana gold JHP and they are much longer than MG FMJ. I'm curious about changing my oal because of pressure. I'm at 1.190 should I go to 1.20 ? I have run some at that oal and they run fine in my 6" Cameron. I need to increase my powder not quite at a happy with PF it is 162 I need a bit more to make major. Edited February 29, 2012 by a matt Link to comment Share on other sites More sharing options...
deerassassin22 Posted March 1, 2012 Share Posted March 1, 2012 Whats you whole load powder and such? SAMMI is 1.135 and your already in the danger zone. When loading 40 long you risk hitting the primer on the Ejector which seems to be the root of evil SO I HEAR on the 40 specifically. That is what I hear I have yet to see it happen but if you go slow you can see where the problem may arise when ejecting a live round but anyway. Lets see what you are loading that would help. Link to comment Share on other sites More sharing options...
yoshidaex Posted March 1, 2012 Share Posted March 1, 2012 If your loads at its current oal run fine in your gun, leave it alone. The JHP will take up a smidge more case volume than your FMJ and dependent on what powder you're using: 1) you may have to lower your charge weight if you want to stay at the 162 PF or 2) keep it the same to get a higher PF. The pf will come up with the JHP, same oal and same charge of powder but again it depends on what powder you're using. Link to comment Share on other sites More sharing options...
a matt Posted March 1, 2012 Author Share Posted March 1, 2012 (edited) 4.6 solo 1k 180 jhp MG oal 1.190 .422 crimp. The primers look fine ( no flattening ). 6 in scheumann bbl. My smith has tuned the ejector. He cut about 1/4 in off. Not that that will stop the AD but the way it was it looked dangerous. The tip of the ejector was long. My goal is 170 PF. Edited March 1, 2012 by a matt Link to comment Share on other sites More sharing options...
yoshidaex Posted March 1, 2012 Share Posted March 1, 2012 Sorry. No experience with solo 1k Do a search here and see what others are loading at. I think starting at 4.6 with the jhp might net you a 165 pf thru your 6" Use a chrono. Link to comment Share on other sites More sharing options...
a matt Posted March 1, 2012 Author Share Posted March 1, 2012 Thanks anyway. I used my chrono today and i am a little slow 162pf. Link to comment Share on other sites More sharing options...
kalaur Posted March 1, 2012 Share Posted March 1, 2012 I just received some Montana gold JHP and they are much longer than MG FMJ. I'm curious about changing my oal because of pressure. I'm at 1.190 should I go to 1.20 ? I have run some at that oal and they run fine in my 6" Cameron. I need to increase my powder not quite at a happy with PF it is 162 I need a bit more to make major. Measure the difference between the two bullets. However much longer the JHP is, that's how much longer you need to load for the same case pressure. Whats you whole load powder and such? SAMMI is 1.135 and your already in the danger zone. When loading 40 long you risk hitting the primer on the Ejector which seems to be the root of evil SO I HEAR on the 40 specifically. That is what I hear I have yet to see it happen but if you go slow you can see where the problem may arise when ejecting a live round but anyway. Lets see what you are loading that would help. Danger zone of what? Most people who use 40 major in competitive shooting are loading much longer than SAMMI specs, to reduce pressures and sometimes enhance feeding. COAL of 1.180-1.220 are very common. Link to comment Share on other sites More sharing options...
blaster113 Posted March 1, 2012 Share Posted March 1, 2012 The oal that Cameron's recommended for my 6" is 1.180. I would keep it in the 1.180-1.190 range and work up loads slowly to get the desired pf. I used up the last of my old Limited practice loads with BBI 180's, 1.20 oal and I had a hard time ejecting loaded rounds. Looks like the bullets would engage the rifling. I think they set up the barrels for oals in the 1.180-1.190 range. With loads at 1.180 my Cameron's gun runs like a top, especially with Zero jhps. dont think its necessary to load to 1.20. Link to comment Share on other sites More sharing options...
a matt Posted March 1, 2012 Author Share Posted March 1, 2012 I'm running a Cameron's also. It eats 1.160 to 1.220. I'm trying to get to about 170pf. A little time with the chrono and I'll figure it out. Thanks for the help. Link to comment Share on other sites More sharing options...
blaster113 Posted March 1, 2012 Share Posted March 1, 2012 fyi, I worked up some loads with Solo 1000 and 165 grain plated bullets. 5.2 grains of Solo at 1.180 got me a pf of 170. Load felt soft and hardly any muzzle rise. This is at sea level with our normal stupid high humidity. with a MG jhp 5.1-5.3 grains of Solo should get 170 pf depending on the altitude. the gun feels like it was built around the light bullets Link to comment Share on other sites More sharing options...
a matt Posted March 1, 2012 Author Share Posted March 1, 2012 Cool thanks Link to comment Share on other sites More sharing options...
deerassassin22 Posted March 1, 2012 Share Posted March 1, 2012 I just received some Montana gold JHP and they are much longer than MG FMJ. I'm curious about changing my oal because of pressure. I'm at 1.190 should I go to 1.20 ? I have run some at that oal and they run fine in my 6" Cameron. I need to increase my powder not quite at a happy with PF it is 162 I need a bit more to make major. Measure the difference between the two bullets. However much longer the JHP is, that's how much longer you need to load for the same case pressure. Whats you whole load powder and such? SAMMI is 1.135 and your already in the danger zone. When loading 40 long you risk hitting the primer on the Ejector which seems to be the root of evil SO I HEAR on the 40 specifically. That is what I hear I have yet to see it happen but if you go slow you can see where the problem may arise when ejecting a live round but anyway. Lets see what you are loading that would help. Danger zone of what? Most people who use 40 major in competitive shooting are loading much longer than SAMMI specs, to reduce pressures and sometimes enhance feeding. COAL of 1.180-1.220 are very common. If you look at all of the "AD'S" when unloading to show clear most rounds are over SAMMI in the 1.200 range becasue most guns when you rack the slide back hard to show clear hits the ejector causing a mysterious boom and leaves you with a jacked up hand and some stuff in your pants. The most popular caliber I have seen as well as other people i talk to is the .40cal Link to comment Share on other sites More sharing options...
EEH Posted March 1, 2012 Share Posted March 1, 2012 I just ordered a case of 180 fmj-should be here next week-- Link to comment Share on other sites More sharing options...
Simon Posted March 2, 2012 Share Posted March 2, 2012 Mg jhp 180 vv n320 5.0gr oal 1.175 gives me a pf of 169 out of a sv Link to comment Share on other sites More sharing options...
a matt Posted March 4, 2012 Author Share Posted March 4, 2012 Thanks for all the replies. 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