Great advice on here so far. I switched from 777 to BH209 and did not look back. Been using the FED 209A primers. Only thing I will add is to get the proper drill bit and clean out the breechplug as part of your cleaning routine. I also blow mine out with an air compressor.

I also weigh my charges. From the Blackhorn website: 100 units by volume x 0.7 = 70 grains by weight. 110 volume charge x 0.7 = 77 grains by weight.

Make everything as consistent as possible. Just like in reloading, consistency equals accuracy.

Last requirement is to post pictures and stories of your success & failures.