What a great site, been lurking a bit trying to soak up info but cannot seem to find any regarding the most useful reamer freebore dimensions for the 300 Whisper.
A 1:8 twist seems mandatory to go above 220gr bullets, though some seem to shoot OK from a 1:10.
The reamer company advised they can machine me a reamer to suit any bullet, but there's the problem!
Supersonic:
I'd like to shoot 125gr Ballistic Tips, 100gr Speer Plinkers or 110gr Speer HP
Subsonic:
200-220gr cast lead bullets
220gr HPBT or
240gr Sierra Match Kings
They advised:
"The standard 300-221 freebore is .160"
240 grain Sierra Match King should have .190" freebore, 1°-30.
125 grain Nosler should have .025" freebore
If you want a reamer that will do both, you can order the reamer with .025 freebore and order a uni throater to throat the chamber out for the 240 grain"
So should I just order the standard reamer, or go for the extended throat version?
Will accuracy suffer greatly by shooting 125gr BT's in such a long freebore?
I guess excess pressures will never be a problem
Hope someone can help, my head is fairly spinning with options
Cheers
BoS
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