Dug out some data from times back that you may find of use. My exception to over 50 gr
was with the 51 gr. Bator. 10.5 gr of 4759, produced (best group at 50 yds), .49". 13 gr of
4227, with same bullet did well holding 5 shots just under an inch at 50. My favorite load
for 222 with cast however is the 37gr NOE GC (weighs 41gr. checked and lubed), over13.1 gr
of Rx7, which in my rifle will hold around half inch for 5 at 50, and do it with regularity.
I suggest that you will find via trial and error that 10th of a grain variance will often make a
difference in accuracy in the 222. It is imperative that 22 cal bullets be weighed to EXACT
weights for peak accuracy. A real pain, but well worth the effort. I prefer my 22 cast bullets
to be hard, and at least 22BH, but prefer them to be around 26-28. I am a believer in Ben's
Red Lube, and one coat of BLL. If you are interested in very lite loads that will produce in
most likely very accurate 50 yds loads, small charges of Red Dot, may be of interest to you,
starting with about 3gr and working up a tenth or a grain or two at a time. With the 37 gr.
NOE they will about fall someplace between a 22LR and a 22Mag. Be very careful in load-
ing these very lite loads, as it is easy do double charge. If you have access to Lyman 225348,
and 225415 I believe you will find both potentially accurate loads with the charges recommended
in this thread. My rifle likes .226. And would suggest you start with.225, and if accuracy is
to your liking, stay with it. If however you are getting less than stellar accuracy at that dia,
you might wish to try .226. I wish you good luck, and hope you will report on your progress.
Paul