dvc4you Posted April 16, 2018 Share Posted April 16, 2018 I was testing my new 9major topend and seeing how much gas was being expelled forward (with the bullet) rather than upwards by the popple holes and compensator. I was shooting a heavily pasted target at 6 inches and seeing how many pasters would fly off . This is my current configuration, shooting 121 MG under 9.2gr of 3N38 @ 1.170. Anyway, I notice not a lot of disturbance in the pasters (good) but did notice unburned powder on them. Is there any change I can do to have 100% powder burn? Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
Guy Neill Posted April 16, 2018 Share Posted April 16, 2018 If the load is otherwise performing as you want, it's likely not worth worrying about. Full burn would most likely need a faster burning powder that may not be able to make Major within as low a pressure. Guy Link to comment Share on other sites More sharing options...
andersonj55126 Posted April 17, 2018 Share Posted April 17, 2018 (edited) 3n38 and other slow powders like AA7 don't fully burn 100% in a pistol length barrel. I believe HS6 is the slowest powder that burns nearly 100%. Edited April 17, 2018 by andersonj55126 Link to comment Share on other sites More sharing options...
kneelingatlas Posted April 17, 2018 Share Posted April 17, 2018 Is there something which leads you to believe a complete burn would better serve your purpose? Link to comment Share on other sites More sharing options...
dvc4you Posted April 17, 2018 Author Share Posted April 17, 2018 The compensator is working just fine, the dot is returning consistently to the same spot.My thought behind the question was that unburned powder = unused gas for the compensator. Not a big issue, I am just greedy....Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
RaylanGivens Posted April 17, 2018 Share Posted April 17, 2018 It would seem that unburned powder would be powder wasted... You should be able to reduce your load and stay at the same powerfactor... Link to comment Share on other sites More sharing options...
MemphisMechanic Posted April 17, 2018 Share Posted April 17, 2018 4 minutes ago, RaylanGivens said: It would seem that unburned powder would be powder wasted... You should be able to reduce your load and stay at the same powerfactor... Unfortunately in short-barrled comp’ed gun (a handgun) with slow burning powder, it doesn’t quite work that way. Link to comment Share on other sites More sharing options...
RaylanGivens Posted April 17, 2018 Share Posted April 17, 2018 1 minute ago, MemphisMechanic said: Unfortunately in short-barrled comp’ed gun (a handgun) with slow burning powder, it doesn’t quite work that way. If it doesn't burn, it serves no purpose. Link to comment Share on other sites More sharing options...
MemphisMechanic Posted April 17, 2018 Share Posted April 17, 2018 5 minutes ago, RaylanGivens said: If it doesn't burn, it serves no purpose. You’re never going to get full burn in this situation, even if you drop the powder charge. You’ll just wind up failing to make power factor. Link to comment Share on other sites More sharing options...
Maximis228 Posted April 17, 2018 Share Posted April 17, 2018 ^^^ Facts Link to comment Share on other sites More sharing options...
RaylanGivens Posted April 17, 2018 Share Posted April 17, 2018 3 minutes ago, MemphisMechanic said: You’re never going to get full burn in this situation, even if you drop the powder charge. You’ll just wind up failing to make power factor. Just now, Maximis228 said: ^^^ Facts I'm not necessarily disagreeing with you two, but it seems logical that it would be the case. If you have 10% unburned powder and remove 10% of the powder... Why wouldn't all the powder now burn? Link to comment Share on other sites More sharing options...
Maximis228 Posted April 17, 2018 Share Posted April 17, 2018 5 minutes ago, RaylanGivens said: I'm not necessarily disagreeing with you two, but it seems logical that it would be the case. If you have 10% unburned powder and remove 10% of the powder... Why wouldn't all the powder now burn? Yea... many have tried this on their own and seen what MemphisMechanic has already stated. You are more than welcome to try your theory, I just know from personal experience it doesn't work like you stated. Link to comment Share on other sites More sharing options...
RaylanGivens Posted April 17, 2018 Share Posted April 17, 2018 1 minute ago, Maximis228 said: Yea... many have tried this on their own and seen what MemphisMechanic has already stated. You are more than welcome to try your theory, I just know from personal experience it doesn't work like you stated. I'm not doubting that it might be true... I'm just curious why... I shoot HS6 and load and chrono like everyone else does... I don't notice much unburned powder, although I don't really look for it... I just wipe it out when I clean my gun... Link to comment Share on other sites More sharing options...
Maximis228 Posted April 17, 2018 Share Posted April 17, 2018 Every open gun major load has unburned powered. Some more than others. Some less. Link to comment Share on other sites More sharing options...
dvc4you Posted April 17, 2018 Author Share Posted April 17, 2018 I was thinking of of switching primers to something hotter, I am currently using WSR primers. Maybe buy a case and do the same test...magnum primers? Other primer brands? This is a heavily compressed load @ 1,175, how about going down to 1,165? Would a shorter OAL decrease the amount of unburned powder?Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
race1911 Posted April 17, 2018 Share Posted April 17, 2018 (edited) ANSWER: Yes, less unburnt powder using magnum small pistol primers (federal) vs small pistol (federal) in my open gun (using HS6 at 1.160)..........you also get slightly higher PF so can go down .1 or .2 grains in your load if you wish Edited April 17, 2018 by race1911 Link to comment Share on other sites More sharing options...
andersonj55126 Posted April 17, 2018 Share Posted April 17, 2018 Quickload software is able to estimate the amount of powder burnt. I found this interesting when I first started using Quickload but I don't think it matters much other than more unburnt powder would likely make the powder seem dirtier. One large benefit of slower powder is generally lower pressure. Here is an example comparing powders assuming same 124gn bullet, case volume, and velocity. Silhouette: 6.69gn, 100% powder burnt, Max pressure 49,692 HS-6: 7.38gn, 97.5% powder burnt, Max pressure 48,451 3n37: 7.05gn, 98.8% powder burnt, Max pressure 46,894 3n38: 8.38gn, 86.9% powder burnt, Max pressure 47,145 (note: heavily compressed) AA7: 8.90gn, 82.1% powder burnt, Max pressure 44,718 Shorter OAL does not make a noteworthy change in burnt powder %. Link to comment Share on other sites More sharing options...
Maximis228 Posted April 17, 2018 Share Posted April 17, 2018 Please tell me how one comes up with those percentages... Cuz im completely lost... Link to comment Share on other sites More sharing options...
dvc4you Posted April 17, 2018 Author Share Posted April 17, 2018 Thanks for all the replies, I am reluctant to reduce my AOL in a 9Major load but I will give the magnum primers a try.Sent from my iPhone using Tapatalk Pro Link to comment Share on other sites More sharing options...
mikeg1005 Posted April 17, 2018 Share Posted April 17, 2018 Ummm your fill capacity directly impacts pressure... and it's not linear nor can you remove powder and expect the same velocity. Link to comment Share on other sites More sharing options...
theWacoKid Posted April 17, 2018 Share Posted April 17, 2018 It's not unburnt powder. If anything it's partially burnt. Partial burn is still producing energy. Link to comment Share on other sites More sharing options...
Maximis228 Posted April 17, 2018 Share Posted April 17, 2018 I just want to know how @andersonj55126 came up with those percentages. Link to comment Share on other sites More sharing options...
superdude Posted April 18, 2018 Share Posted April 18, 2018 4 hours ago, Maximis228 said: I just want to know how @andersonj55126 came up with those percentages. Quickload software. Link to comment Share on other sites More sharing options...
Ijustwannashoot Posted April 18, 2018 Share Posted April 18, 2018 I was having same problem with my steel loads using A2. I just added some more crimp and problem solved Link to comment Share on other sites More sharing options...
Maximis228 Posted April 18, 2018 Share Posted April 18, 2018 11 hours ago, superdude said: Quickload software. I highly doubt 9 major has accurate data listed. Considering no one offers what most of us load. Link to comment Share on other sites More sharing options...
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