I shoot mine with 777 pellets,,a little more cost but really convienient,,and the 295 hp Powerbelt and the 240xtp sabot by TC with 2- 50gr pellets will shoot into a 3 inch shootnsee target all day long.
At the range it's best to swab the barrel every few shots with windex,,to keep the ease of loading and accuracy.
I have a BSA 4 power mounted on my gun and sighted in at 75yds,,but it shoots great at 100 and likely a bit farther also.
Hope this helps.