Ive burned at least 5lbs of it and never had a crud ring from BH209. Didnt matter if i was using conicals or sabots. Never had to run a dry patch before 20 shots even with lubed conicals. Probably a good idea too though depending on lube.

My last time out i did not use a modified BP, i used a standard Knight FPJ. Occasionally in the past i would get a hangfire with most non mag primers except Win209s. CCI standards seemed the worst too or Rem STS IF its in a FPJ.

With FPJs, now i only use mag primers in OEM Knight Disc FPJ breach plugs. The hole is well over .032 so unless yours is clogged mags work just fine. The flash channel may get some build up though but only takes a few seconds to clean.

My LK must have an even larger hole since its even better with non mag primers. Its close to .036-7 as best i can measure it. According to Al at Knight they are different than DISC plugs.

I can usually go at least 20 shots before i notice any "lag". Some days ive never had any. Temps and humidity seem to effect this a little. On warm days i can sometimes use Win209s without an issue but on cooler days the mags go off fine every time if the flash channel is clean.

Try a good bore polish (JB or ME Copper Cream) and Montana Extreme Bore Conditioner. Using both has made cleaning any barrel much easier/faster for me.

Plus the bore conditioner does not seem as bad as an oil if you dont run any patches before shooting. If i left any RemOil in the bore and fired any of mine it was nasty. Brake cleaner or Windex with a good amount of rubbing alcohol added seem pretty good at making sure nothing is in the barrel before firing. A lightly damp patch is fine then a couple of dry ones.

BTW BH209 does leave soot in the barrel but bullets load easier for me with a little soot than a totally clean barrel. Usually more accurate too. The residue on the BP though can be a PITA cleaning at the end of the day.

And did you fire off just a couple of primers first?

Scott