Cheaper pellet question?

I have found that apolo 33gr .25 caliber pellets shoot pretty darn well in my fx guns. They don’t do as well as fx 33.95 or jsb but for .04 cents a round off Amazon they are very much minute of squirrel out to 50 yards. Groups at 50 seem closer to and inch or .75 rather than moa but like I said for the price they are a good choice out to 50. Only weird thing I noticed was they shot really well slower in my Maverick compact (800 fps) but seem to like 900 fps in my 600 mm impact.