Here are the numbers:
Rifle RWS 34
Pellet 1.5y 28.5y BC 48.5y BC
JSB 8.4 806 644 .0144 577 .0161
AA 8.4 808 707 .0252 643 .0243
JSB 10.3 714 632 .0256 577 .0247
AA 10.3 712 634 .0269 578 .0252
What's interesting is a pretty significant difference between the 8.4 grain pellets. As you will see below the retained velocity on the Air Arms versions of the 8.4 is significantly higher at both distances. The 10.3 grain pellets were essentially the same.
And since everything was set up I ran some JSB 18s at these distances:
Rifle Royale 400
Pellet 1.5y 28.5y BC 48.5y BC
JSB 18.1 882 799 .0375 754 .0387
Rifle RWS 34
Pellet 1.5y 28.5y BC 48.5y BC
JSB 8.4 806 644 .0144 577 .0161
AA 8.4 808 707 .0252 643 .0243
JSB 10.3 714 632 .0256 577 .0247
AA 10.3 712 634 .0269 578 .0252
What's interesting is a pretty significant difference between the 8.4 grain pellets. As you will see below the retained velocity on the Air Arms versions of the 8.4 is significantly higher at both distances. The 10.3 grain pellets were essentially the same.
And since everything was set up I ran some JSB 18s at these distances:
Rifle Royale 400
Pellet 1.5y 28.5y BC 48.5y BC
JSB 18.1 882 799 .0375 754 .0387