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This comes up at times, should one hunt with a clean or fouled barrel with a M-L? My answer is usually for the shooter to test their own gun and see if & how much the point of impact changes. Even when shooting Blackhorn 209 I prefer to keep my bore clean as much as possible, though a few days fouled with B209 is no biggie. It can be more of an issue leaving the bore dirty with other powders & pellets.
My test did involve firing two primers before loading, so the bore was slightly fouled with primer residue. The gun was a 45 Cal Knight Elite, 110 grains of B209, crush-rib sabot holding a 200 grain XTP, CCIM primer.
The 1st shot was right on, the 2nd shot was almost in the same hole. I just used the 50 yd backyard range. I'm just setting up to go on an IL deer hunt this weekend.
Of course another load, another gun, another shooter may have different results with the fouled bore test. I'm just relating how my recent one went.
My test did involve firing two primers before loading, so the bore was slightly fouled with primer residue. The gun was a 45 Cal Knight Elite, 110 grains of B209, crush-rib sabot holding a 200 grain XTP, CCIM primer.
The 1st shot was right on, the 2nd shot was almost in the same hole. I just used the 50 yd backyard range. I'm just setting up to go on an IL deer hunt this weekend.
Of course another load, another gun, another shooter may have different results with the fouled bore test. I'm just relating how my recent one went.