Mk 248 MOD 1 300 Win Mag Ammo

Kino

Sergeant
Belligerents
Mar 14, 2011
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Very Southern Indiana
Guys I am in the process of getting a custom build that is reamed for the 220 SMK and was wondering how many grains of H1000 to start with and what most of you guys are ending up with to be in the 2850 range? Thanks!
 

1shot2kill

Gunny Sergeant
Belligerents
Dec 9, 2008
1,290
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142
36
north dakota
Re: Mk 248 MOD 1 300 Win Mag Ammo

according to hodgdon's website it says start at 73.0 max is 78.0 however that is for a 220 gr round nose same weight more bearing surface 75.0 would be a good place to start and work up until you see signs of pressure fwiw i think you will get pressure signs before you hit 2850