The "Modern Pneumatic" air rifle has limitations when it came to shooting a heavier
homemade pellet. I decided to start making another rifle to see if I could get the
pellets to group at 100 yards. I am using this build as a test rifle to try different
spring tensions, hammer weights, hole diameters and valves designs.
(click on pictures to enlarge)
Here you see the hammer tube and valve block.
I was going to use the top block as my breech but decided on something a little simplier.
Mounted a round shaft to the hammer tube.
The barrel mounted to the gun is a 24" Crosman and the other is a .308 that I was
given from a gunsmith.
The rifle does not have a reservior at this time. I am going to add one soon. It is
a little hard to fire from the bottle as the "whip" from the bottle tends to stiffen
at high pressure. Using the trigger from the "Modern Pneumatic" I shot a few pellets
with it. Didn't group all the well as didn't have a sturdy rest to keep the rifle steady.
Here is a look at the .304 pellet. I made a
mold to cast the pellets. Note the comparison to a Crosman .22 Hollow Point.
I took out the test rifle and shot from a distance of about 100 feet.
Some pictures of the my setup.
Target at 100 feet, results. For taking out
the gun the first time and shooting pellets from a mold I made in 1 hour I think the
results are reasonable.