Originally Posted by TomYoung
Like Ronnie, I drew a CO ML tag. I'm trying to work up a load with the .501" 300 gr. Thors. Have been using 100, 113, and 120 gr. by weight Black Mag. Not getting good groups in my Knight .......3+".(It groups 1-1/2" with 285 gr. Barnes and Harvester sabots with 110 grains T7 FFFg) What is your load with Blackhorn? Are you shooting the 300 gr. Thor? Did you find other primers didn't group as well?
Drew a unit 84 mule deer buck tag myself this year!
I've never shot Black mag but have read about it in the past and it seems some had issues with it sucking up moisture.
With the 250 and 300gr Thor's in my CVA Optima i am shooting 100gr Volume Blackhorn209 and CCI 209 Magnum primers. These CCI Mags offer me the best accuracy so far. NSI primers " italian medium heat brand" offered horrible accuracy.
3" if thats with open sights is pretty good.
I did notice you said 100 - 113- 120 Weight Black mag. Is that right? Because if it is, thats going to be a big time over load, especially the 120gr Weight charge.
Using pyrodex and blackhorn209 for example, 120 grains Blackhorn209 by weight is 85.2 grains and 120gr pyrodex rs is 82.6 grains.
I just wanted to make sure you werent actually using 120gr weight black mag as that could get ugly.
My Optima at 100 yards with the 300gr Ballistic Tip Thor and 100gr Blackhorn209.
250gr Thor with 100gr Blackhorn209. The black dot im holding next to it is for sizing. Its a 1" repair sticky.