10mm powder weight for 155gr hsm plated flat nose

FOWELKILLER · Jan 9, 2015

wow 9gr seems like alot to only get 1007fps.i need to read up on quickload there is a lot of stuff on those charts ive never seen before very interesting stuff.thanks again.

Steve M · Jan 9, 2015

That 1007 FPS is for a 3" barrel. If you have a 10mm with a 3" barrel I'll eat my hat*.

In general you need more powder to get a light for caliber bullet moving. For example, I load 40 S&W using Longshot. To get 1000FPS with a 155gr takes 6.6gr and to get that same velocity from a 180gr takes the same 6.6gr. To me that is a sign that the 155gr not well suited to the 40, but wars have been fought over less controversial subjects. Your 10mm would need more than 6.6gr thanks to the even larger case volume driving down powder density and pressure. I realize you have 165gr, but I'm using the data I have for the 155gr as it conveys the idea.

A max load of 8.2gr of Longshot under a 180gr bullet in a 10mm is 1150 FPS with a 5" barrel according to Hornady 9th. This would certainly be a safe load a with 165gr as it would probably provide a similar velocity but at a lower pressure. To me a max load of 9gr seems reasonable, but ~1250 FPS from a 5" barrel more likely based on my Hornady 9th load data, 170gr data in my Nosler 4th, and 165gr data in my Lee 2nd.

* or a cookie

FOWELKILLER · Jan 10, 2015

thanks for the info,i was just thinking about some of the other loads i was seeing around the web and they stating 1300fps with 10gr and 165gr,but again hsm wants there bullets under 1200fps,so i think ill start with 8gr and work up.ill play with the faster stuff when i get some fmj.the sweet spot for my 9mm 5.25in g-34 for idpa is 1050fps with the plated bullets,completely different caliber but ill try to start around the same speed.

Benchrest · Jan 10, 2015

5in:

FOWELKILLER · Jan 12, 2015

thanks for the info sorry havnt been on for a few days.been redoing a 30-30 somebody tried to restore,got it ready for the blue tank.

FOWELKILLER · Jan 24, 2015

ok i finally got to shoot the new glock.so i ended up loading the 165hsm with 7.5gr wsf and 7.8 both were decently accurate, cycled flawlessly OH THATS RIGHT GLOCKS ALWAYS DO

but all in all went bang.10 seems pretty fun.gotta get some dawson sights on it.but thanks everyone for the help.

2gr8dgs · Jan 25, 2015

I think you will enjoy the Dawson sights. I have them on my g20. As for the reloading of 10mm, glocktalk.com has a forum dedicated to reloading the 10mm under it's "gunclub" subforum. It's been a lot of help to me.
Good luck!