Some Observations
Over the past couple months I've been shooting some new muzzys and my CVA Accura V2 which I swapped out a scope. The newer ones were a new to me Rem 700ML and a new Knight Disc Extreme. And I had a Badger Ridge 209 ignition system installed on the Rem and the Disc Ext I put in a Lehigh 209 conversion.
Through past experience I knew that Alliant Black MZ, 80 gr and a 300 gr Hornady .430" XTP in a green Harvester CR sabot was the most accurate load (the .452" in a black CR is just as accurate) in the Accura V2. So switching scopes and sighting in was a snap.
But going to both the Rem and Knight was a different story. Try as I might, and I really did, I wanted BH209 to work in these rifles or at least in one of them. But alas it was not to be. After a couple frustrating outings with each one I went and tried the Black MZ. The results were real eye openers. Groups for both rifles shrunk considerably. The Knight showing the best improvement with groups going from about 2.5" down to just a tad over 1"! The Rem improved also and is accurate enough for my hunting but I'm sure can be tweaked a bit more next year.
Another observation I noticed is that for consistency I like to swab the bore after each shot so that all (except the first) shots are shot out of the same semi clean bore. In doing so at the range and using the proper solvents for BH209 and Black MZ I found that the Black MZ leaves considerably less fouling in the bore. Both are easily removed but the 209 requires more swabbing.
Now for all you fans out there I know that with equal charges BH209 will give you higher velocities and I won't argue that point. But IMO I prefer accuracy over velocity and in 3 out of 3 of my inlines, Black MZ wins hands down in the accuracy department.
So OK now you can beat me up if you like but my targets don't lie!!!!