Grumpy I just decided to try out a 10mm I picked up a Ruger SR1911 in 10mm. I have never shot a 10mm but I like what I've heard and read about them it feels good and the trigger is good I haven't shot it yet I picked a couple of factory ammo so I can shoot right away and I've ordered the dies and some brass I have a ton of different .400 bullets from loading 40s any advice on loads, or powders I have read that this gun doesn't like max length col