Author Topic: Smith & Wesson 77A .22 Cal (Read 894 times)

dougk · « **on:** December 25, 2004, 12:35:58 AM »

I was digging through my old stuff and remembered I had an air gun that is over 25 years old. The air gun is a Smith and Wesson .22 cal 20 pump and is marked Smith & Wesson Air Gun Div. Springfield Mass. USA.

Does anyone have any performance specs on this relic, it still works after being stored for over 20 years and moved mutiple times?

Thanks,
Doug

dougk · « **Reply #1 on:** June 20, 2005, 05:33:55 PM »

I found the owners manual. But the fps is not listed. Is there any way to determine the FPS?

Doug

Lawdog · « **Reply #2 on:** June 21, 2005, 10:29:31 AM »

Quote from: dougk

I found the owners manual. But the fps is not listed. Is there any way to determine the FPS?

Doug

Yeah, get a hold of a chronograph and shoot a few pellets thru it to find the average fps. of your rifle/pistol. Lawdog

dougk · « **Reply #3 on:** June 21, 2005, 12:01:25 PM »

A What??? :-D

I was thinking of timing the shot to hit a steel sign, moving until it takes 1 second then measuring the distance... :-D :-D :-D

LittleJerry · « **Reply #4 on:** June 21, 2005, 04:17:27 PM »

Quote from: dougk

I found the owners manual. But the fps is not listed. Is there any way to determine the FPS?

Doug

If you are a math/physics head and have some other airguns laying around you could get a generalized guesstimate of its FPE based on its penetration compared to your other airguns, then figure the velocity for the wieght of the pellet and FPE you determined.