Looking to hear from those with lots of experience in BP loading. I load for my 1888 TD and 1874 Pedersoli Sharps in 45-70 and 1874 Shiloh Sharps in 45-90, so I have some good experience but still learning a lot on how BP loads really work.
I guess my main question is how does one properly adjust BP grains based on changing to different lots? I developed a very good load for my 1888 TD with my very first lot of BP and was able to use the Buffington sights almost exactly as designed. 500gr bullets at .459 are the ticket and I directly seat the bullet over 64gr of Swiss 1.5 and don't need to use a compression die. So super easy to load.
Yesterday, I was practicing at 300 yds and used the same 64gr but different lot. It grouped great but it was shooting super high. I had to adjust the sights to around 260ish yds to be on the 18 inch target and 300 yds. My past loads were either on 300 or in between 275 and 300.
I am wondering if a complete load work-up is needed every time a new lot is used or do I stick with my grains and adjust my sights accordingly? Thanks - Tom.
I guess my main question is how does one properly adjust BP grains based on changing to different lots? I developed a very good load for my 1888 TD with my very first lot of BP and was able to use the Buffington sights almost exactly as designed. 500gr bullets at .459 are the ticket and I directly seat the bullet over 64gr of Swiss 1.5 and don't need to use a compression die. So super easy to load.
Yesterday, I was practicing at 300 yds and used the same 64gr but different lot. It grouped great but it was shooting super high. I had to adjust the sights to around 260ish yds to be on the 18 inch target and 300 yds. My past loads were either on 300 or in between 275 and 300.
I am wondering if a complete load work-up is needed every time a new lot is used or do I stick with my grains and adjust my sights accordingly? Thanks - Tom.
