just curious, what calibers can a glock 21 be converted to ?

is there anything that it can shoot that would be cheaper than .45acp for raining purposes?

.22lr

last thing i knew, i could still reload .45 for less than i can by .22lr for WHEN you can find it.

Just buy another glock then since it won't cost that much more than a good conversion kit.

Easier to find rimfire ammo than pistol powder around here, guy.

Doesn't help I started reloading 4 months ago.

Well...

.40 S&W
10mm (not really any cheaper)
357 sig

for starters.  There are others, just what I'm familiar with.

Go here for parts

With G17s being in the 450$ range I would just buy one instead of spending 200 bucks for a barrel and mags

it is the exact opposite here in Oregon.  .17hmr or .17hm2 is the only rimfire you can find around here. i would love an upper in .17hm2.

.51 Gyrojet

I bought a like new police trade-in gen 3 G22 for $325 that came with 2 mags. Picked up a 9mm drop-in threaded barrel for $100, and some used Glock 17 mags for $10-15 each. I have ~$450 in it, 2 calibers, and some extra mags that may be worth their weight in gold again someday.

I bought it in November 2012, shot some 9mm with it, then 9mm went to $0.75 per round for junk, but .40S&W was still around for $0.35 per round. Now that Wolf 9mm is back down to $0.20 per round, I'll start shooting 9mm again. The .40/9mm combo is perfect to have on so many levels.

Edit: Oh yea, he has a G21 though.....

day shift?