For $300, you could get a decent .22 LR pistol. Shop local pawn shops or gun stores to see if you can find a used Ruger Mk. II or Browning Buckmark. Mosins and other milsurp guns aren't a bad suggestion, though my personal opinion is that they have limited utility*.
However, you might also consider buying other gear that you could use that is very helpful to have. Here are a few suggestions:
-
Electronic hearing protection
-
Spotting scope
-
Range bag(s)
- Spare parts/extra magazines for the guns you do have
- A couple of
MGM auto-poppers
- Gun locker/gun safe for the guns you have and the ones you will get
- Membership at a local shooting range
- Ammo and/or reloading components
- Manually-operated clay pigeon thrower, couple cases of clays, and a couple boxes of ammo
- Entry-level reloading setup (you may need to set the money aside and add to it though)
Ok, none of that stuff is as fun as having a new gun, but in the long run it is money well spent.
*This is just my opinion, and I know, you think I'm wrong.
Please don't derail the thread debating the finer points of collecting old military guns.