Flea Posted May 23, 2022 Share Posted May 23, 2022 I know basically nothing about this topic. I attended my first match that had a chrono. I was shooting Federal Syntech 9mm 150g ammo out of a G5 Gen 34. It was pretty hot and humid yesterday. Muzzle velocity on the box says 890fps so the PF should have been around 134. It chronoed at 145. Any ideas why that happened? Thanks Link to comment Share on other sites More sharing options...
Rnlinebacker Posted May 23, 2022 Share Posted May 23, 2022 Most powders are temp sensitive where they go up in warm weather and go down in colder. Some can be reverse temp sensitive where they go up in cold and down in warm. Do you run an aftermarket barrel? Link to comment Share on other sites More sharing options...
Flea Posted May 23, 2022 Author Share Posted May 23, 2022 6 minutes ago, Rnlinebacker said: Most powders are temp sensitive where they go up in warm weather and go down in colder. Some can be reverse temp sensitive where they go up in cold and down in warm. Do you run an aftermarket barrel? No stock. Does going up from 134 to 145 seem typical? Link to comment Share on other sites More sharing options...
Rnlinebacker Posted May 23, 2022 Share Posted May 23, 2022 8 minutes ago, Flea said: No stock. Does going up from 134 to 145 seem typical? Yes. They usually test out of 4 inch guns. Your barrel is 5.31 so you will get more bullet stability and velocity. There's no more powder than usual so send it Link to comment Share on other sites More sharing options...
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