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Post by ET on Dec 31, 2020 23:48:42 GMT -5
Shooting an SML you will experience success and failures with your loads. We feel elated with a successful load but feel disappointment with a failure, scratching our heads as to why. Some shooters just move on to other loads but some still keep trying to adjust their loads in hope improvement can be found before moving on. Then there’s a few of us, okay at least one who will keep trying every approach possible to make a load work because he feels it should work. With time on my hands, I decided to review my past successes and failures with the 50. For some reason my focus went to the previously failed 200XPB testing that haunts me. My gut says it should shoot but all I’ve got so far is an upset gut, chuckle. The first area I want to address is the reduction of surface area contact on the main body of the 200 XPB because of the drag groove. By adding an aggressive knurl, I hope to eliminate possible slippage in the sabot and hopefully get rid of my gut ache, chuckle. Now if this should fail then you would think a normal person would throw in the towel. Guess I’m not a normal person because there is a plan B yet to play out. If slippage is not the problem then could it possibly be the long nose design for the short body? One way to find out. After all it’s about the learning. Worst I can do is self-inflict a few more gut aches I have to endure, chuckle. Let’s see what 2021 brings. [/url
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Post by dannoboone on Jan 1, 2021 12:31:04 GMT -5
Problem with Barnes copper bullets: never measured any of them that was advertised diameter. Always less. I had some of those 200xpb's and they all measured .450 and less. At one time, someone stated that the bullets do start out at the stated diameter, but the bullets get tumbled to take off jagged edges resulting in slightly less diameters.
That being said, my tightest group ever was done with the 200xpb's which were annealed, knurled, and full formed for a .45 barrel.
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Post by ET on Jan 1, 2021 13:52:08 GMT -5
Dannoboone Thanks for sharing your experience with the 200XPB. For some reason my focus keeps coming back to nose design and length of cone to body length. If the nose design is causing my problem of instability then I want to try an inverse cone and see what happens. But here I have to sacrifice some bullet weight to test this theory. What can I say but I just got to know.
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