Twist rate

[W.gaynor]

does twist rate apply to a pellets weight being accurate like if does for standard rifles and bullets?

I have a Beeman Kodiak 177 and .22 caliber. The .177 groups horribly with various ammo.

 

[Septicdeath]

I posted this link. Hope this helps. It's on part 13 so you will have content table at the top.
https://www.pyramydair.com/blog/201...-rate-affect-velocity-andor-accuracy-part-13/

 

[Septicdeath]

I also have RS2 I have never even tried the .177 barrel. The .22 is very accurate. I may try it and see if mine is the same as yours. Will let you know.
You might try seating your .177 a bit in the bore. Check your breach block screw and stock screws to make sure there tight. Check scope screws. I Blue loctite all of them. When you put the barrel in tap it with a mallet. Tighten the barrel screw really tight. Check it after 10 shots.