Re: Need advice for reloading a .243
The faster the twist, typically the heavier bullet you can/may need to shoot.
for example, berger recomends the following twist rates for these bullets:
95 vld 1/9 twist
105 vld 1/8 twist
115 vld 1/7 twist
I have a 1/9.25 twist ( a little faster than the 1/10) and it loves the 95 berger vld hunting with 41.5 grains of H-4350. it is very picky with the oal, but once that was dialed in, it shoots them great. I didnt try the 105 berger,but did try some other bullets in the 100- 105 grain range and couldnt get them to shoot well.
with all of that in mind, i would say your gun will likely favor something in the 90-95 range. I am not saying this is the gospel, but if it were me, i would start in that area. actually because of th luck i have had with the berger 95 vld hunting and h-4350, if i was doing another 243, thats exactly where i would start.