Started this thread on Art of the Rifle,TFL back in October and, after extensive experimentation with H450 & 200 gr. bullets (both Sierra and Nosler part.), still not satisfied with accuracy. Plan to try Barnes X 200 gr. but would like to get reasonable group w/above bullets before trying the Barnes.
H450 works great in my 30-06 w/190 gr. bullets but apparently not in this particular rifle/caliber.
Rifle is a post 64 mod. 70 and I have bedded the action, floated the barrel and lapped the bolt lugs, which yielded some improvement but not much. Most 5 shot 100 yd. groups are over 2.25"....by some fluke shot one five shot 1.1" group which I have been unable to duplicate and one 5 shot group, four of which measured 15/16").
Have just about decided H450 is not the powder for this particular rifle and bought some H 4831SC, Retumbo and IMR 7828 to play with.
Quite a bit of info available on 4831 and 7828, not so much on Retumbo. Anyone done and accuracy work with the above powders?
Thanks for your input.
Regards,
hps
H450 works great in my 30-06 w/190 gr. bullets but apparently not in this particular rifle/caliber.
Rifle is a post 64 mod. 70 and I have bedded the action, floated the barrel and lapped the bolt lugs, which yielded some improvement but not much. Most 5 shot 100 yd. groups are over 2.25"....by some fluke shot one five shot 1.1" group which I have been unable to duplicate and one 5 shot group, four of which measured 15/16").
Have just about decided H450 is not the powder for this particular rifle and bought some H 4831SC, Retumbo and IMR 7828 to play with.
Quite a bit of info available on 4831 and 7828, not so much on Retumbo. Anyone done and accuracy work with the above powders?
Thanks for your input.
Regards,
hps