I am looking for proven loads for a 221 Fireball in a Remington rifle. Accuracy and velocity. Thanks.

15-16.0 gr Lil Gun, 40 gr vmax, cci BR4 or 450, 1/2" 5 shot groups and 3400+fps, also had good luck with H4227, AA#9,AA1680 all in a cz 527 22" barrel

20.0 grs. RL-7, 40 gr. Hornady V-max, Rem 6 1/2 primer. COL = 1.925". 100% fill, near max. load, @ 3270 ft/sec., 1/2" 5 shot group at 100 yrds. CZ 527 rifle.

This load is from Hodgdon's data. It is one of the starting loads for 40gr.bullets. 14.5gr.Lil Gun,Remington 7 1/2 and I used Sierra Blitzking #1440C. And what's not to like about 482 loads from a pound of powder?
I didn't chronograph it but their data shows around 3,200.
My rifle(700 Remington) has been fully blue printed and has a Hart barrel the 1st 5 shot group went .187. That ended load development for this rifle.
I might add that this rifle as well as 9 other Remingtons all have factory triggers.

Stepchild