What springer did you shoot today?

Do you have the original spring? I tried the 13.4 and they were in the 700-750 fps range so I just dismissed them as too heavy.
No I have the Vortek PG4 tune up kit. Even with the original spring you use, nothing wrong with your fps, that is close enough...the .177 Monster Diablo has great knockdown power.....as well as good trajectory. Better than going to .22's loop trajectory at distance. A great option! I sort them to 10gr +/- 13.43gr. World of difference.
 
Sighted in Diana model 60 .177 Tenex 4.52 8.4 grain 580 FPS
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@ 20 yards
 
Finished the tin of 500 RWS 7gr with my new R7. The next 500 for the wear in process is 500 CPHP. And so far it’s looking good, better than the 7gr wadcutters.
This is the first 5 since switching, the two groups after that, except one bad pellet, were tighter groups. All the CPHP are fitting in snug. I had one that went in really easy, and it hit .75” lower than all the other pellets.

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