The questions I have are as follows
1) I found .22 Magnum Gamepoint CCI Rimfire Cartridge, 40-Grain JSP Lead Bullet, 1875 fps, 40 Rounds at walmart, will this work?
NO! You need .22 LR or .22 short not .22 Mag
2) Is there any danger given the age of the rifle of firing the rifle given it's age.
Not being able to inspect it, I can't say.
If your rifle is not specifically marked “.22 long rifle,” then do not attempt to use that cartridge. It is a completely different cartridge than the “.22 long.”
stay away from LR’s if barrel’s cartridge stamp specs out short/long. LR’s and Longs, two different cartridges. some of the older make/style .22’s WILL shoot all 3 fine in fact I have 3 oldies that funtion great with all 3, (been a long while since any shorts were used though) but these 3 are factory manufactured and noted to function correctly and safely with those 3.
BEFORE I READ THE REST OF THE REPLIES, LET ME SAY THIS:
Bzzzzzzzzzzzzzzzzt!!!!!!!!! WRONG answer.
.22LR is DIFFERENT from .22Long .... DO NOT ATTEMPT TO SHOOT .22LR is a rifle chambered for .22 short/long .... it's a HUGE mistake. You were right about the .22mag though .... :)
Regards
.22 LONG, not .22 Long Rifle.
Perdogg will have better luck finding Shorts than Longs. I've seen shorts recently, at least before the latest run on .22s in general, but I don't recall ever seeing longs, although I've fired many guns which could chamber shorts, longs, or long rifle. In fact most any that will chamber LR will chamber the others, although semi-autos may have feeding issues and the lighter catridges may not cycle the action. But it doesn't work the other way. A gun chambered for .22 Longs should not be used for Long Rifles, although it probably won't chamber them properly anyway.
The center three are Short, Long and Long Rifle.
.22 Short .22 Long Rifle
I used to buy Shorts for my wife's grandfather's Belgian made Browning .22 semi-auto rifle. That was back after the '68 Gun Control Act, and before the '86 Firearms Owners Protection Act. You had to show ID and sign a log, to purchase any ammo that could be used in a handgun. I'd show my military (officer's) ID, just for the Irony of the situation.
BTW, the Browning was a beautiful weapon. Probably still is, which ever of my two brothers in law scarfted it up after my father in law passed away. (Which of course was somewhat after his father, the original owner, passed. Although Grandpa was 90+, while FIL was still in his late '70s when he passed. My own grandpa was 99+)