I have not tried them personally, but every review I've seen do not recommend them past 50 yards @ subsonic velocities due to the non-diabolo design. A diabolo (shuttlecock) configuration is required for projectiles propelled at subsonic velocities with the typical air rifle barrel twist rate of 16 turns per inch to keep the projectile stable in flight through the effective range."Imold"Anyone try the H&N 82gn Grizzlies in 357?? I see they are the same head size as the JSB 81.02gn diabolo which is .356........
http://www.pyramydair.com/article/Velocity_and_Pellets_April_2003/2
Here's the opinion on the .357 Grizzlies of the Master, shot out of none other than the RAW HMx 1000!:
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