Originally posted by wgsigs:
No, I think the problem is my wording. I'll try again.
The external dimensions of the P228 and P229 grip frames are the same. So I was wondering if the internal dimensions (specifically the width) are also the same (wide) and that the only difference is the opening being wider on the P229 than the P228, if that makes sense. I started to wonder when I looked at my P228 and thought the wall of the magwell opening looked thicker than the walls of the grip frame.
Okay, took my P228 out of the holster, unloaded, and locked open. Got my P229R out of the safe, checked clear, and locked open. Started measuring carefully with strong cheaters (reading glasses) and the nearest tape measure, which reads to 1/32". Measuring the outside just in front of the the grips (too lazy to go grab an Allen wrench to take the grips off the P229R), they are indeed the same on the outside. Looking very carefully and measuring the flat, straight inside part, not the bevel, I get 1/32" less than 7/8", or 27/32" for the inside measurement of the P228. Doing the same on the P229R, I get 1/32" more than 7/8", or 29/32". WTF, how? Looking closer, I see that the P228 has more of a bevel, while the P229R has the barest hint of a bevel. The only conclusion I can draw is that they made the P229/40 frame 1/32" thinner on each side to sneak in the extra capacity without changing the outside of the frame and requiring different stocks. Both frames appear to be straight on the inside and there is no step where it is smaller at the bottom and more open higher up on the P228.
Slosig, I believe the .40/.357 P229 mags were made wider strictly for capacity. The P226, because it has longer grips, using basically the same mag get 12 rounds of .40/.357 from a 15rd 9mm mag. If SIG did the same with the 13rd P228/P229 9mm mag they would probably only get 9 or 10 rounds so they widened the bottom in order to get 12 rounds.
Right, I understood why they made the P229 .40/.357 mags wider. I just wondered why they didn't do the same for the P226, as more boolits is better, right?
Maybe with the longer grip portion of the frame on the P226 they were concerned about thinning the frame and maintaining structural integrity, or maybe another round or two when they were already at 12 wasn't worth the hassle.