Viht N140 or N540 in 22BR

[fox]

Does anyone have any experience of running either of these Vihtavouri powders with the heavier bullets, 70-75gr in the 22BR with a 9" twist barrel.

 

[zfgo01]

Does anyone have any experience of running either of these Vihtavouri powders with the heavier bullets, 70-75gr in the 22BR with a 9" twist barrel.

What I shoot in my .22BR is fairly close. I tried a bunch of powders and bullets but found 29.1 Gr. of VV140 and a Rem 7-1/2 primer behind a 62 gr bullet gave my best accuracy. The barrel, however, is a 12" twist. I tried the lighter bullets but just couldn't get consistent accuracy. I was a bit surprised to find the 62 shot so well.

glen