I got a 22 caliber Caiman X last year but didn't try slugs in it until recently. When I cleaned it there was a noticeable choke and I just concentrated on pellets. But I had most of a tin of 21 and 25 grain H&N slugs and I was bored so I tried a few groups. To my surprise groups were pretty good. 3/8 to 9/16 inch for five shots at 30 yards. That is worse than it's favorite 18 grain pellet but it's close. So I ordered a sampler which is on its way. But I'm wondering if I should increase the regulator before additional testing.
I get about 910 on 18 grain pellets. I turned up the hammer spring and got them to about 925. The 21 grain slugs were at about 825 with the pellet tune and 860 with more hammer spring. The 25 grain barely get to 800.
These speeds seem OK for pellets but slow for slugs. Should I turn the reg up 10 or possibly 20 bar and see if I can't get the 25 grain up around 900 fps?
A related question is how much difference velocity is likely to make. For pellets I think it is more of a fine tuning thing. If a gun likes a pellet at 800 it will also like it at 880 but accuracy may still improve a little at a specific velocity. If slugs are typically similar to this then I can decide the weight the gun likes best and then vary the velocity.
I get about 910 on 18 grain pellets. I turned up the hammer spring and got them to about 925. The 21 grain slugs were at about 825 with the pellet tune and 860 with more hammer spring. The 25 grain barely get to 800.
These speeds seem OK for pellets but slow for slugs. Should I turn the reg up 10 or possibly 20 bar and see if I can't get the 25 grain up around 900 fps?
A related question is how much difference velocity is likely to make. For pellets I think it is more of a fine tuning thing. If a gun likes a pellet at 800 it will also like it at 880 but accuracy may still improve a little at a specific velocity. If slugs are typically similar to this then I can decide the weight the gun likes best and then vary the velocity.
a new .22 barrel with slugs. Just taking a breather and saw this topic. A 520mm barrel is perfectly adequate in slug land. But if you have a Caiman X with a 520 and a Caiman Y? with a 620mm barrel sitting in front of you to test the same exact slugs, the same slug might work the best in both guns but your speed will be different. If you find a slug that groups best on your pellet tune, then move forward with that slug. You can then try to increase the speed and see what happens. Things may look fantastic as you increase speed, but it can be deceiving. It takes a minimum of 75 yards to tell you what you really have going on with what you think is excellent or even good.