Crown MK2 500mm with .177cal slugs

[Corvid_hunter]

What would be a reasonable fps expectation for the MK2 with a 500mm slug liner and 13gr JSB KO slugs?

 

[JaceSpace1369]

What would be a reasonable fps expectation for the MK2 with a 500mm slug liner and 13gr JSB KO slugs?

950-1000fps

 

[jps2486]

950-1000fps

I don't think so, not without a lot of modification starting with a longer barrel.

 

[JaceSpace1369]

I don't think so, not without a lot of modification.

Does it have a lighter hammer than the impact mk3? Cause I was able to push 10gr slugs at 1070fps with just 125b, which puts the 13.43gr JSB kO at 970

 

[Scotay42]

Does it have a lighter hammer than the impact mk3? Cause I was able to push 10gr slugs at 1070fps with just 125b, which puts the 13.43gr JSB kO at 970

Hammer is probably the same, but the plenum is not.

 

[JaceSpace1369]

Hammer is probably the same, but the plenum is not.

True, but you can bring the reg to 160b so I assume 1000fps with the 13.43gr is still achievable