Paraphased from Sigforum info:
The P250 9mm compact comes with a 16 round magazine. There have been two distinct issues with this magazine:
1.) The first 100 or so shipped with the incorrect spring and follower, effectively reducing the magazine to 15 rounds capacity.
2.) Even with the correct spring and follower, people are still having an difficult time getting the 16th round into the magazine.
Sig claims that all of the bad springs and followers shipped have been accounted for, but some people still don't believe it.
To be sure you have the correct spring and follower:
- Lay your magazine down with the front facing the right - remember this orientation (note it in the picture below) as you disassemble the magazine next.
- Dissassemble your magazine per the owner's manual by pushing up on the Magazine insert pin at the bottom of the floorplate.
- Slide the floorplate to the right (forward) on the magazine to remove it, keeping tension on the insert with your thumb. (Have you accidentally slipped the floorplate off letting the spring fly out of the mag and launch your floorplate and follower across the room? I did. Once. Once...)
- With the magazine floorplate removed, and the magazine laying down facing right, slide out the spring.
- The bottom metal insert attaches to the spring with a little eyelet, and should be on *left* side of the spring if you have the mag oriented correctly.
- Counting the coil that the insert is attached to, count all the coils on the left-hand side.
- You should have exactly 10 coils for a 16-round magazine.
- If you have 12 coils, you have a 15-round magazine.
NO, you cannot simply snip off a coil to make the spring shorter. Someone tried it and I guess the springs have different tensions/profiles which make this fruitless.
Also, look at the follower. A 16 round follower has a small plastic rectangle sticking out of the bottom that the top of the spring wraps around. I guess the 15 round follower does not have this.
The Magazine tube and floorplates are evidently the same. Just some were loaded with a 15 round spring and follower.
Just because you're having a hard time loading the 16th round in your magazine does not neccessarily mean you have one of the 15 round magazines. Check your spring and follower before calling Sig for replacement. If you are one of the lucky ones to get a 15 round spring and follower, you can call Sig and complain. Per the Parts list on the owner's manual you need a #37 Follower and a #38 Spring. Everything else should be the same.
I have shamelessly lifted these two pics from SigForum as they are worth a thousand words:
Courtesy of Thrak
Courtesy of motor
Now, you know you've got the correct 16 round spring and follower, but you still can't get the 16 round into the magazine? Try using a sissy loader. Someone mentioned that using an UpLula allowed them to easily get the 16th round into the magazine. Using this might start to loosen up the tension of the spring allowing you to eventually get the 16th round in by hand.
http://www.topgunsupply.com/uplula-magazine-speedloader-universal_pistol.htmlI still have not been able to get the 16th round in by hand, but I may pick up an UpLula to see if that helps. I will keep everyone posted.