just curious how fast your .223 handi shoots? mine has the 22" stand taper barrel. here are the results i get with my loads:
40gr. vmax W748/28.0g 3350fps
50gr. vmax W748/26.5g 3112fps
50gr. vmax H335/26.0g 3100fps
50gr. bal.tp W748/26.5g 3075fps
50gr. bal.tp H335/26.0g 3177fps
these are max loads in my rifle. any hotter and i get flattened primers, stuck cases and poor accuracy. these are the only powders and bullets i've tried so far. i shot some 55gr. federal premium tbbc factory ammo and got over 3100fps. also, i forgot to mention that i seat all my rounds to 2.255" oal since my .223 has such a long throat.