9X25 Dillon

telecster · 05-20-2011, 18:51

Really thinking about giving this bad boy a try in my G20.. Who here reloads and shoots this round..

Meathead9 · 05-20-2011, 20:50

There's a few if us over in the 10mm Reloading Forum. I have had a lot of fun with this caliber, working up 90gr XTP's to average 2050fps. You'll probably get more feedback in the 10mm Reloading & 10 Ring forums. Here's a link to the 9x25 Dillon Reloading Data thread.

http://glocktalk.com/forums/showthre...=228796&page=5

65grendel · 05-29-2012, 00:25

hi, I'm currently trying to reload for the 9x25 dillon cartridge also. The problem I am having is seating the bullet straight. I am using Montana Gold FMG into Double Tap's case and the Dillon 3 die set. The case have a slight bell at the mouth which appears to be insufficent to allow for the bullet to enter into the mouth straight. What can I do to widen the case mouth that will allow the bullet to enter in alignment with the casing?

F106 Fan · 05-29-2012, 07:15

Quote:

Originally Posted by 65grendel

hi, I'm currently trying to reload for the 9x25 dillon cartridge also. The problem I am having is seating the bullet straight. I am using Montana Gold FMG into Double Tap's case and the Dillon 3 die set. The case have a slight bell at the mouth which appears to be insufficent to allow for the bullet to enter into the mouth straight. What can I do to widen the case mouth that will allow the bullet to enter in alignment with the casing?

I suppose it matters whose reloading dies (and reloader) you are using. Belling is often done as part of the powder drop and, in the specific case of the Dillon powder measure, you make the adjustment at the powder drop die.

Page 11 here shows how to make the adjustment for the Dillon powder die:
http://www.dillonhelp.com/manuals/en...l-May-2007.pdf

Other die sets do it differently.

Richard

65grendel · 05-29-2012, 07:36

Thanks Richard, I'll give this a try soon.
Robert

dkf · 05-29-2012, 07:50

Adding more flare will the bullet seat straight and then set the crimp up to remove the flare. The bullet seating stem can also cause misalignment if it is not making proper contact with the bullet.

Meathead9 · 05-29-2012, 08:56

For the 9x25, it's better to use bullets with a more pronounced straight wall. The 9mm RN profile bullets aren't the greatest example, the XTP or any similar JHP will be a better fit in the 9x25's straight neck. The 9x25 Dillon is a speed demon, so MG bullets aren't the best for that either. The brass jacket vs copper jacket tends to create more friction in the barrel, causing lower velocities in a lot of loads. I had the same problem with bullets (XTP's) seating crooked using the Dillon seater. The XTP's profile has a very steep angle from shoulder to HP cavity, and doesn't make good contact with the Dillon seater plug (either side). I added more flare, and that seemed to help. Then I had a new seater plug machined out of SS to fit the profile of the XTP perfectly, problem solved.

.

65grendel · 06-09-2012, 05:12

[QUOTE=Meathead9;19025300]For the 9x25, it's better to use bullets with a more pronounced straight wall. The 9mm RN profile bullets aren't the greatest example, the XTP or any similar JHP will be a better fit in the 9x25's straight neck. The 9x25 Dillon is a speed demon, so MG bullets aren't the best for that either. The brass jacket vs copper jacket tends to create more friction in the barrel, causing lower velocities in a lot of loads. I had the same problem with bullets (XTP's) seating crooked using the Dillon seater. The XTP's profile has a very steep angle from shoulder to HP cavity, and doesn't make good contact with the Dillon seater plug (either side). I added more flare, and that seemed to help. Then I had a new seater plug machined out of SS to fit the profile of the XTP perfectly, problem solved.

I bought a Lee Universal Expanding die to help widen the belling so that the bullet can at least sit balanced in the case mouth. That much I have accomplished, but the bullets continue to seat crooked. Is there another way to correct this problem?

Meathead9 · 06-09-2012, 14:04

I would try a JHP or TC profile bullet or maybe a 9mm Redding Competition Seating Die. I was really lucky, and had the opportunity to have a custom seater plug made (customized for the .355 XTP profile).

Hoser · 06-09-2012, 18:05

The novelty of a 9x25 wears off fast. Loud and a wrist snapper for sure.

Might be good for deer hunting, but thats about it.

_The_Shadow · 06-09-2012, 19:46

This cartridge needs proper headspacing and the neck tension and crimp are essential to performance and function. After proper sizing the case neck should be expanded and trued using any 9mm or 357Sig expanding die to uniform them. I have used the RCBS 9mm and the 357Sig expander dies with great results, bullets go in straight and have great neck tension to prevent setback issues.

This is an interesting cartridge, it requires plenty attention to the details, it preferes longer barrels. Its performance lacks in barrels less than 6" but does work in the 3.78" G-29. While published load data is short, plenty of loads listed in the 10mm loading section as mentioned.

It does out do the 357Sig by 200-300+ fps with the same bullets. Recoil is not any worst than the 10mm and slightly more than the 357Sig.

Best regards ~