I have the same model ,
and I never put more than 2 50 grain pellets or 100 grains loose in it .
My actual hunting load for mine is 80-90 grains loose , it gets excellent accuracy and punch with that .

I put three pellets in it when I first got it to see what it would do . It wouldn't group worth crap , but it sent a 250 grain hollowpoint straight through an 8" cedar log with no apparent difference in entry and exit holes . Three pellets also caused me to lose a buck last year , the rifle kicked too high , even with the muzzle brake on . Stick with the load it likes .