help needed regarding 9mm power pistol 124gr XTP

[mrapathy2000]

am a fairly new loader and have ran into a bit of trouble regarding 9mm load data. seems 124gr XTP runs little wide and my Steyr M9 does not like it when seated to the suggested length of 1.150" bullet hits the rifling. I have toyed with seating depths and COL's seems the 124gr XTP will not hit the rifling when the COL is 1.125-1.127. I have no problem at all with Hornady 115gr FMJ round nose loaded to 1.150 and looked at some other cartridges my gun has shot winchester 115gr whitebox FMJ&JHP,speer 124gr FMJ,CCI blazer 115gr,S&B 115gr FMJ,UMC 115gr FMJ.

at moment working with power pistol powder though all data I have is Lee's speed die paper,deluxe die set paper,modern reloading book and alliants web page data which list 124gr jacket bullets COL to 1.150. oddly they list 115gr COL 1.120. I measured the hornady 115gr FMJ and 124gr XTP the XTP is + .005 taller.

think it would be okay to use 115gr data at 1.125 with 124gr XTP would leave same internal capacity as 115gr maybe back off loads some slightly below 6.0 gr work up? also keeping eye on gr data for 147gr though thats 1.140 OAL not messing with 147gr bullets but read somewhere when dont have data start with heavier bullet data work up something like that anyway.

anyone have any other data. have done some searches seen some issues with CZ pistols saw some people going to shorter OAL. I havent toyed with changing OAL's I know the basics further out less pressure further in more pressure
bring the OAL lessen powder. again powder at moment is POWER PISTOL.

on another note does anyone know what OAL winchester's website data uses? see they show 1.169 max didnt bother to include it elsewhere and have some Win Super Field would like to use eventually.

appreciate any help.

 

[griz]

Bullet weight is as much, or more, of a factor compared to internal capacity. So don't use 115 grain data with a 124 grain bullet. I would use the starting charge that Alliant lists for a 124 grain bullet, and adjust the OAL to get reliable feeding. Work up from there if needed.

 

[mrapathy2000]

the issue is not feeding the issue is the Hornady XTP hits the rifling when the OAL is parked at 1.150 such as my Lee and Alliant data suggest for Min OAL.

btw the data I have list 115gr load as start of 6.0gr and maximum of 6.6/6.7. thats for OAL of 1.120". same page of data says to seat 124gr XTP,FMJ at 1.150" and use the same weight of powder 6.0gr to 6.6/6.7. further out lower pressure.

came across a hornady page which shows OAL for 124gr XTP as 1.060" with min of 4.3gr and max of 5.7gr for OAL 1.060"

more compfortable taking overall length out and working loads up. wasnt sure where to start on low end with reduced OAL.

being newer loader I always start low and work my way though is nice to have a reference before I start slinging powder and seating bullets. didnt expect to find suprise of 124gr XTP hitting the rifling when seated to 1.150 when other bullets have no problem doing that and more. unexpected curve ball.