I got some more shooting time with the 40 caliber rifle today and things are moving along nicely. I had started with loads that were on the sedate side and since I could trust all the mechanical aspects of the rifle I decided to move up to the speed commonly sought for this type of shooting.
To that end I submit two images. The one appearing directly below this paragraph is a maximum charge of H-4198. As it turns out that amount is 45 grains of powder. All the components are the standard I will be dealing from start to finish: 200 grain Shockwave bullet, CCIm primer, and a 1/8? thick fiber wad. The three shot timed at 2334fps average. The group size is a bit more than 1 1/8?.
The next image will be a target shot with 62 grains of Benchmark loaded under the standard component set. With 17 grains extra powder you might expect the bullet will be moving a bit faster and you?d be right. The timer average sizzled to 2687fps. The three shots group to just less than 1 ??.
I would have to state the shooting conditions were good but not great with considerable wind and some mist but those were not major considerations. What is a consideration is my shooting. I feel there is no doubt that both of these groups are larger than the rifles potential because I was using a rest with only average steadiness. With a really good rest as much as ?? could be taken off either load. Still it is my practice (and will remain) to shoot without the assist of a mechanical rest. Doing this I can usually count on the rifle?s owner getting as good or better results as I do.
Some comment need said on the speed of shooting. I don?t have the proper size fiber wads so I punch some from 50 caliber disks. I also knurl the bullet for a better barrel fit. Even though I do both these step between shots I still got in a full shooting session in about half the time I normally spend with a 10ML because there is no barrel cooling time required.
Shooters should know that even though the recoil is greatly reduced from what you?re likely to have in a 50 caliber barrel that when the speed goes over 2600fps you need to have a good hold on the rifle. It couldn?t be described as serious recoil but it?s no BB gun either.
The load, pressure, and bullet speed will certainly be predictable along the path of how much powder is burned at the same pressure. H-4198 has a maximum load level of 45 grains and is good for just below 2400fps. H322 has a maximum load level of 54 grains and will shoot to about 2500fps. Benchmark has a maximum load level of 62 grains and shoots to about 2675fps.
The above could be carried on to other powders as well. A powder like H-4895 or Reloader 12 could reach a maximum charge of about 66 grains and shoot about 2750fps. The process could continue up to powder levels of 75 grains or so but by then the recoil is about equal to a 338 Winchester magnum.
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To that end I submit two images. The one appearing directly below this paragraph is a maximum charge of H-4198. As it turns out that amount is 45 grains of powder. All the components are the standard I will be dealing from start to finish: 200 grain Shockwave bullet, CCIm primer, and a 1/8? thick fiber wad. The three shot timed at 2334fps average. The group size is a bit more than 1 1/8?.
The next image will be a target shot with 62 grains of Benchmark loaded under the standard component set. With 17 grains extra powder you might expect the bullet will be moving a bit faster and you?d be right. The timer average sizzled to 2687fps. The three shots group to just less than 1 ??.
I would have to state the shooting conditions were good but not great with considerable wind and some mist but those were not major considerations. What is a consideration is my shooting. I feel there is no doubt that both of these groups are larger than the rifles potential because I was using a rest with only average steadiness. With a really good rest as much as ?? could be taken off either load. Still it is my practice (and will remain) to shoot without the assist of a mechanical rest. Doing this I can usually count on the rifle?s owner getting as good or better results as I do.
Some comment need said on the speed of shooting. I don?t have the proper size fiber wads so I punch some from 50 caliber disks. I also knurl the bullet for a better barrel fit. Even though I do both these step between shots I still got in a full shooting session in about half the time I normally spend with a 10ML because there is no barrel cooling time required.
Shooters should know that even though the recoil is greatly reduced from what you?re likely to have in a 50 caliber barrel that when the speed goes over 2600fps you need to have a good hold on the rifle. It couldn?t be described as serious recoil but it?s no BB gun either.
The load, pressure, and bullet speed will certainly be predictable along the path of how much powder is burned at the same pressure. H-4198 has a maximum load level of 45 grains and is good for just below 2400fps. H322 has a maximum load level of 54 grains and will shoot to about 2500fps. Benchmark has a maximum load level of 62 grains and shoots to about 2675fps.
The above could be carried on to other powders as well. A powder like H-4895 or Reloader 12 could reach a maximum charge of about 66 grains and shoot about 2750fps. The process could continue up to powder levels of 75 grains or so but by then the recoil is about equal to a 338 Winchester magnum.
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