Karma Max power with 62gr XLR slugs

I did some tuning today with my Karma EQ in .25. I wanted to max out FPS with these 62 grain griffin XLR slugs. I settled at

3300 reg pressure
Hammer spring max
Transfer port at max

The result was about 860 FPS for three shots. I took outside and made good conduct with 2 shots at 79 yards. Feeling encouraged, I moved back to 120 yards and put 3 consecutive shots on a 3” steel. Afterwards I calculated the FPE and it came out to 101! Anybody have any similar experience?

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