Re: 243 advice?
Does your father handload? If so, he should give these loads a try:
85 Gr. Sierra Gameking
Lapua brass
36 Gr. IMR 4064
CCI 200 primers
2.648 OAL (.020 off the lands)
.272 bushing (.001 nk tension)
100 Gr. Sierra Gameking
Lapua brass
36 Gr. IMR 4064
CCI 200 primers
2.658 OAL (.010 off the lands)
.271 bushing (.002 nk tension)
105gr AMAX
47.0gr Retumbo
CCI 200 primers
Lapua brass
2.284 to ogive, .02 out
Shoots great in my 9 1/8 twist all the way out to 678 yards (as far as I've been able to shoot).
If he doesn't reload, I've had great results with the Federal 85 gr. Seirra Game King loads and suprisingly, the cheapo Winchester 100 gr. powerpoint loads. The 95 gr. Federal Fusion loads also shot really well in my rifle.