After several days of high winds and quite damp and nippy temps, yesterday was a reprieve with temps in the 30's and winds in the 10-15 mph range. Maybe it was cabin fever setting in, but I decided to take the ole 1884 Springfield Trapdoor rifle out for a little tuning up. Adam and I have a bit of a sidebar challenge going for the current match and I am definitely determined to give him a run for his money.
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The '84 Trapdoor was zeroed at 260 yards. I have no idea why this particular distance was chose in lieu of the normal even hundreds of yard/meters. Normally, I apply a judicious amount of Kentucky windage and do OK. For this match I want to use a six o'clock hold on the paint and use the "Christmas Tree" sight aperture on the Buffington sight.
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For the 45-70 Trapdoor, I normally use the 405 gr case roundnose hollow base bullet dropped from a Lee mould. I size these at .459". I have been using Accurate Arms 5744 powder because it isn't position sensitive, eliminating the use of a filler. I also have eliminated using a wad to that the bottom of the hollow base bullet can expand and get a better grip on the rifling, a-la Minie ball. 5744 is a bulky, fast-burning powder with good ignitabilty that works well in large bore, straight case rounds like the 45-70/90/110/120.
The proper bullet for this infantry rifle is a 500 grainer. The whussy horse soldiers complained of severe shoulder pain when firing this round in the short little carbines. To mollify them a bit, the bullet for the cavalry carbine was reduced to a 405 grain bullet. Call me a whuss, but I like the 405 grain bullet, especially its hollow base. That 500 grainer, even in the bigger infantry rifle, can result in a run for the medicine cabinet after a healthy round of shooting.
Yesterday I pumped 40,500 grains of lead down range with loads between 24 and 27 grains of 5744 in 0.5 grain increments. My best results seemed to come in the range of 25.5 and 26.0 grains. Still, I think that I will experiment a bit more in the 26.5 to 27.5 grain range.
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25.5 grains of AA-5744
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26.0 grains of AA-5744
Hopefully, with a bit more tweaking and practice, I can get the groups to tighten up a tad and obliterate that ugly red ball in the center.
I post this so that the old Oracle of the Honey Bucket will clearly see what he is up against.
Jethro
In case you are wondering, after shooting yesterday, I also went through several 500 grain capsules of Aleve for the shoulder after the initial numbness wore off.
