High Cap Magazines
PAT -
There is no guarantee you will be able to keep you LEO high-caps when you retire. If you do not retire, but resign, change jobs, etc., you will be required to turn them in to your agency (even the ones you paid for out of your own pocket.
Non-LEOs might as well forget about high-caps. For all practical purposes high-cap magazines are a non-player for new purchasers. They are very hard to find and getting harder. (Beretta seems easier to find. Sig is not as good. HK and Glocks are almost impossible.)
When you do find them the prices are at best outrageous (usually well over $100). My personal philosophy wants three magazines: one in the pistol, one fully-loaded spare, and one empty spare(except when I am actually going shooting) for rotation . So, if I can find them, I am probably looking at close the $400 in magazines by the time I pay shipping, handling, tax, etc. (If you have a P99, you better get a second mortgage.) That'll buy a lot of practice ammo and/or a good pistol course. By the time you buy a pistol and three high-caps your looking at close to $1000.
Paul K -
I know you are looking at the .40 S&W, but there was coupled of totally false and/or misleading statements made that need to be corrected:
The 45 does match the 40 but it requires a bigger gun with less ammo.
Actually, the .45
generally exceeds the .40 in the better loadings. The .45 can be had in .40-size handguns (for all practical purposes) with the same ammo capacity (not less) if you are looking at compacts. Probably, the best example is the Glock 30 which is basically the same size the Glock 23. (The G30 actually feels better for me, but that subjective.) The 30 holds ten rounds just like the 23. The .40 does shine in smaller "pocket size" pistols like the G27 and Kahr.