Riley Posted April 28, 2019 Share Posted April 28, 2019 Here is some data from yesterday and today's short trial period. I was previously having feeding issues with factory MagTech 180gr FMJ FP as well as the 180gr Blues loaded to 1.125". Any number of things were tried including mag springs, polishing the extractor and breech face, super cleaning the gun etc. Turns out, this gun seems to like 1.140 to 1.150 ammo better, at least in this short test. Everything up to 1.155 or so would plunk and spin just fine but I wanted a hair shorter for magazine fit. Higher quantity and accuracy testing to follow, hopefully next weekend. To come up with the 4.5gr load I checked Alliants data for a 180gr ACME at 1.160 max of 5gr and subtracted 10%. Also, looking at their data for a Speer 180gr plated at 1.120" max is also 5gr. I really like this Sport Pistol powder. It doesn't meter quite as well as the CFE-P I was using for 9mm, it may improve after the new powder measure gets more use, but it's close and is a lighter color that's easy to see in the 40 case. Minimum charge isn't sooty so far. It was too windy to test for smoke but the gun doesn't seem any dirtier than the factory ammo I was using. I have high hopes for the 1.145 COL load, if its accurate that will be the one. Temp was about 60* both days, windy and sunny with the chrono at 15' from muzzle. PF calculated off of Average fps. So, YMMV, use at your own risk and gun etc. 180gr Blue Bullet 4.5gr Sport Pistol 1.120 COL WSPP 18 rounds H: 1000 fps L: 970 fps A: 981 fps ES: 30 SD: 7 PF: 176.8 180gr Blue Bullet 4.5gr Sport Pistol 1.125 COL WSPP 8 rounds H: 992 fps L: 956 fps A: 973 fps ES: SD: PF: 175 180gr Blue Bullet 4.5gr Sport Pistol 1.150 COL WSPP 12 rounds H: 978 fps L: 946 fps A: 961 fps ES: 32 SD: 9 PF: 172.98 180gr Blue Bullet 4.5gr Sport Pistol 1.145 COL WSPP 22 rounds H: 968 fps L: 949 fps A: 960 fps ES: 19 SD: 4 PF: 172.8 180gr Blue Bullet 4.5gr Sport Pistol 1.140 COL WSPP 8 rounds H: 992 fps L: 955 fps A: 966 fps ES: 37 SD: 11 PF: 173.88 This compared to around 187 PF with MagTech factory and 180gr Blues at 1.130 at 5.9gr, min charge, of CFE-P. CFE-P is sooty at lower charge weights so I'm not sure if I'm going to try again at the slightly longer COL. Link to comment Share on other sites More sharing options...
muncie21 Posted April 28, 2019 Share Posted April 28, 2019 I agree that bullets that are too short for a particular gun are just as problematic as those that are too long. When I tested my CZ .40 loads in my STI, 1-2 bullets per mag would get hung up on the feed ramp. The CZ will eat 1.13 OAL all day long, the STI not so much, that gun likes 1.16 or so. Link to comment Share on other sites More sharing options...
CZGeoege Posted May 14, 2020 Share Posted May 14, 2020 On 4/27/2019 at 11:33 PM, Riley said: Here is some data from yesterday and today's short trial period. I was previously having feeding issues with factory MagTech 180gr FMJ FP as well as the 180gr Blues loaded to 1.125". Any number of things were tried including mag springs, polishing the extractor and breech face, super cleaning the gun etc. Turns out, this gun seems to like 1.140 to 1.150 ammo better, at least in this short test. Everything up to 1.155 or so would plunk and spin just fine but I wanted a hair shorter for magazine fit. Higher quantity and accuracy testing to follow, hopefully next weekend. To come up with the 4.5gr load I checked Alliants data for a 180gr ACME at 1.160 max of 5gr and subtracted 10%. Also, looking at their data for a Speer 180gr plated at 1.120" max is also 5gr. I really like this Sport Pistol powder. It doesn't meter quite as well as the CFE-P I was using for 9mm, it may improve after the new powder measure gets more use, but it's close and is a lighter color that's easy to see in the 40 case. Minimum charge isn't sooty so far. It was too windy to test for smoke but the gun doesn't seem any dirtier than the factory ammo I was using. I have high hopes for the 1.145 COL load, if its accurate that will be the one. Temp was about 60* both days, windy and sunny with the chrono at 15' from muzzle. PF calculated off of Average fps. So, YMMV, use at your own risk and gun etc. 180gr Blue Bullet 4.5gr Sport Pistol 1.120 COL WSPP 18 rounds H: 1000 fps L: 970 fps A: 981 fps ES: 30 SD: 7 PF: 176.8 180gr Blue Bullet 4.5gr Sport Pistol 1.125 COL WSPP 8 rounds H: 992 fps L: 956 fps A: 973 fps ES: SD: PF: 175 180gr Blue Bullet 4.5gr Sport Pistol 1.150 COL WSPP 12 rounds H: 978 fps L: 946 fps A: 961 fps ES: 32 SD: 9 PF: 172.98 180gr Blue Bullet 4.5gr Sport Pistol 1.145 COL WSPP 22 rounds H: 968 fps L: 949 fps A: 960 fps ES: 19 SD: 4 PF: 172.8 180gr Blue Bullet 4.5gr Sport Pistol 1.140 COL WSPP 8 rounds H: 992 fps L: 955 fps A: 966 fps ES: 37 SD: 11 PF: 173.88 This compared to around 187 PF with MagTech factory and 180gr Blues at 1.130 at 5.9gr, min charge, of CFE-P. CFE-P is sooty at lower charge weights so I'm not sure if I'm going to try again at the slightly longer COL. I have been loading my TSO with sport pistol too. 180gr DG COL 1.170 4.5 gr sport pew federal spp 170PF Link to comment Share on other sites More sharing options...
Riley Posted June 11, 2020 Author Share Posted June 11, 2020 After several thousand rounds, I’ve settled on the shorter length and 4.5gr of Sport Pistol. 180gr Blue Bullet 4.5gr Sport Pistol WSPP 1.125” COAL Mixed brass 173-175 PF Also, dumps brass nicely about 6-7’ away with a 14lb recoil and 15lb hammer spring. Link to comment Share on other sites More sharing options...
CZGeoege Posted June 21, 2020 Share Posted June 21, 2020 On 6/11/2020 at 2:59 PM, Riley said: After several thousand rounds, I’ve settled on the shorter length and 4.5gr of Sport Pistol. 180gr Blue Bullet 4.5gr Sport Pistol WSPP 1.125” COAL Mixed brass 173-175 PF Also, dumps brass nicely about 6-7’ away with a 14lb recoil and 15lb hammer spring. That’s almost my exact load, thanks for the info. Link to comment Share on other sites More sharing options...
Runnin2live Posted June 22, 2020 Share Posted June 22, 2020 CZGeorge, did you reek your barrel to get to 1.17?Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Runnin2live Posted June 22, 2020 Share Posted June 22, 2020 *ream not reekSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
CZGeoege Posted June 22, 2020 Share Posted June 22, 2020 5 hours ago, Runnin2live said: *ream not reek Sent from my iPhone using Tapatalk No Link to comment Share on other sites More sharing options...
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