I have a BME 44 Swinging a APC 20-10 @ 7600 on the ground and only have 1.5 gals. in it,

Would it be a good Ideal to try a 21-8 ? My PW WM Extra 300 Weighs 15.8 Lbs.

I would like to slow it down a bit but add more thrust

I did try a Master Air screw 22-8 But was only able to turn 6000 on the ground.
Any Help from you BME 44 Guys would be Great.

What brand is the best too.