IMR 4198 in 6mm br

[Meidleber]

Just wondering if it is safe to try using IMR4198 in a 6mm br with 14 twist barrel. I have a bunch for my .223.

 

[Shooter32]

I dont see why you couldn't, Hodgdon does not give a load for it, but they show 22.0grs with a 70gr Nosler BT for a 6PPC . So that would make you a good place to start your loads and just work up till you see pressure signs and then back it off a little .

 

[ReedG]

The new Hodgdon annual reloading manual shows loads for the 6 BR with H4198.

Starting / Max. Loads:

55-gr. Nosler = 26.0 / 28.8
58-gr. Vmax = 26.0 / 28.5
60-gr. Sierra HP = 25.0 / 27.5
65-gr. Vmax = 25.0 / 27.5

They list muzzle velocities in the same range as with the favorites like Varget, Benchmark, etc. Mind you, this is Hodgdon 4198, not DuPont/IMR, so adjust loads accordingly. I have no experience of any kind with IMR powders so can not offer any suggestions.

Let us know how your loads work.

Merry Christmas ...

 

[Meidleber]

I've worked up a few nice loads with the 55 gr gamekings from 19grs to 24grs. Thanks for the input.