Western Airguns Western Rattler 357

I am new to the Western Rattler 357.

For the life of me, I can not get it to shoot tight groups! I also have an FX Crown MkII in 25 and I am extremely happy with the accuracy.

I experimented with Nielson slugs from 79 grains up to 125 grains keeping the FPS around the 880 range. I cleaned the barrel yesterday with no improvements with 110 grain slugs. Not sure what to try next. I am new to the PCP airgun game, but I've been shooting center fire rifles for years.

Any help would be greatly appreciated.

Thanks in Advance!!!
 
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I keep reading that there's less accuracy with pellets and light slugs out of these Rattler's. Try a longer slug. This barrel has a 26-1 twist rate and the 125 gain slugs should be the sweet spot for stability out of the barrel, as it's nearly perfect 1.53. The longer 142 grain slugs shoot great as well. Being a semi auto, you.should experiment with different types of holds and how it likes to rest on a bag or bipod while shootimg.

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