I reload .243 a bunch, and with the 9 1/8 twist Rem 700 had very good groups with 100 gr. SMK CCI 200 41.5 gr. H-4350 OAL 2.810
for shooting paper.

for hunting I use the 100 gr. SGK same as above, both shoot about the same, Never had very good luck with the Speer 100 gr.

Rio7