9Major: XDm loads with WAC

[vash_241987]

I got my barrel back from Springer Precision, I got it throated to accept rds loaded out to 1.160". I made 7 loads, the first 4 were loaded out to 1.140". All loads tested were with hornady XTP 124gr. JHP with WAC as the powder, Fed small pistol primers and mixed brass. Used a Prochrono.

These 4 were loaded to 1.140"

String 1: 6.8

Hi 1386

Lo 1311

Av 1339

ES 75

SD 24

PF=166

String 2: 6.9

Hi 1426

Lo 1363

Av 1400

Es 63

SD 19

PR=173

String 3: 7.0

Hi 1426

Lo 1396

Av 1412

Es 30

SD 8

PF=175

String 4: 7.2

Hi 1474

Lo 1424

Av 1442

Es 50

SD 16

PF=178

These 3 were loaded to 1.160"

String 5: 6.8

Hi 1394

Lo 1357

Av 1368

Es 37

SD 12

PF=169

String 6: 7.0

Hi 1447

Lo 1405

Av 1416

Es 44

SD 14

PF=175

String7: 7.2

Hi 1455

Lo 1426

Av 1441

Es 29

SD 11

PF= 178

My though:

Shooting a compensated pistol for the first time with fast loads was a pleasant surprise. I can't describe it but there is a big difference. At first I was having problems with light primer strikes, but luckily I brought my stock striker spring and everything was fine as far as the gun going BANG!! I did have issues with FTE and also the spent casings not flying far enough, maybe its my right support thumb blocking most of the ejection port since I'm a lefty.

Here is the vid with the light primer strikes, look at those horrible flinches lol. (Click on pic to view video)

I am glad that I got the barrel throated as I noticed that the shorter OAL were showing signs of too much pressure causing close to flattening primer effect. The longer OAL primers seem to fine though. I'm thinking I may end up sticking to a 6.8 or a 6.9 of WAC and have a OAL of 1.160". Once I get more bullets in, I'll tinker with the recoil springs a little more, currently I am using a 1911 guide rod made for the XDm with Wolff 13lb spring.

Suggestions appreciated!!

EDIT: Fixed the issue with the layout. Stupid MacBook, apparently my chrome browser is acting up and won't let me post replies or start new topics. Had to write this up on word then send it to my email on my iPhone. Then copy and paste it to this forum from my iPhone....geez

Edited April 25, 2013 by vash_241987

[DRichardson]

The ejection issue may be too heavy of a recoil spring. Drop it down to 11 or so and retry. Remember with a XDm going too light with the recoil spring can cause it not to go into battery consistently though.

Good lookin slide. Got any better pictures?

[vash_241987]

The ejection issue may be too heavy of a recoil spring. Drop it down to 11 or so and retry. Remember with a XDm going too light with the recoil spring can cause it not to go into battery consistently though.

Good lookin slide. Got any better pictures?

Sure!