If the powder charge is correct each time, the speed will drop a little each shot but will level off at about 100- 150fps slower than the first shot in a barrel that had reg powder residue left behind. Then add a jacketed bullet an the problem compounds. If nothing else, it might spook some of us with lots of older lots of powder, to round file the powder, and buy new? Hope they dont hold their breath waiting for me.Click to expand.What your seeing is the lack of trace lube that Trail Boss is not leavening behind because it's lacking in that powder. I guess Alliant had some reason to reduce some of their loads. What I am saying is that its a safe hobby, but its not for stoners, or those drinking a 12 pack instead of morning coffee. I am not saying huge room for error is in reloading. Well, if all that is in one chamber, katy bar the door. A guy misreads the scales, a guy actually uses the wrong powder, a guy uses a piece of brass given to him or picked up on the range, a guy uses the wrong bullet weight, behind a max load for a lighter bullet, and then misreads the scale, and then is using a piece of crap brass. Lots of variables are at play, but generally, what blows up or damages a gun are great human error. In a rifle, assuming one was within the middle range of any of the tested books, it will generally only lock up the bolt. In a handgun, a couple extra grains may well take a gun apart, depending on all the factors. A load may be safe at 40 degrees, and lock a bolt up at 110 in the NV desert. it takes the ability to observe tell tale signs, like flat primers, sticky extraction, different levels of recoil, and then one must decide what caused any of them. It takes common sense, it takes the ability to read and comprehend what the books are saying. Or they lose sleep over mag versus standard. Lots of novice reloaders think for example swapping a primer brand will blow their gun up. Bore size, case size, chamber size, outside air temp, and several other factors cause the variables. this is just one load comparison, there are hundreds, all within the range of a grain or maybe three, and all from established sources. In other words, the burning rate of Unique has not changed greatly in what? near 70 years? Would 12 grains damage a gun now? No, not likely at all. An RCBS cast book from the early 90s shows 8.5 to 10.5 Thus in a 1938 source, I find 9 to12 grains of Unique (as example) behind a 165 cast in a 32 Win Special. Powder does not change burning rates, to a dangerous degree and them use the same number. And perhaps even actually read their intro, explaining most of what little I cover here. Any that do not believe, well, simply pick up 3 different established manuals and compare. Now in some they are equal to maybe a half grain or so. ALL of them vary by a few grains same round. I have something like 2 dozen hard cover manuals, some dating from the 1930s up to Hornadys latest. In experience is at play, as well as lawyer shock to some degree from the powder guys. When I see internet advice about long established loads being unsafe, because of one source warning, I tend to cringe because then that advise gets repeated, and soon, has novices afraid to go into the water. I just re read one post, certainly the muzzle report will be less than a "full power" jacketed bullet load, but I still submit, and know from experience, that in a cast bullet load, 2 less grains will not make a significant difference in muzzle report. The particular load affects that noise, not the "can" on the end of the weapon. I have shot similar loads mentioned in similar cast bullet rounds, the difference in muzzle report is negligible.īut its like the old cliche, "ya never hear the one that gets you" is based on the bullet is traveling faster than the speed of sound, thus one is "dead" in theory, before the sound ever gets there, either of the muzzle blast, or the sound barrier being broken by the bullet.Īgain suppressors can reduce the sound of the muzzle blast on a cop shop gun, but the only way the bad guy will not be aware he is being shot at down range, is if the ammo velocity is indeed traveling below the speed of sound. while certainly a 30/06 passing over head in the target pit is near loud enough for ear protection, a 223 going overhead is not nearly as sharp, but its still "supersonic". Now the "crack" down range, its either subsonic, or its not. Certainly reducing a powder charge is going to reduce the report heard by the shooter at the muzzle, but to what extent is subjective to each shooter. Where the error is being made, is what "subsonic" means. As the book shows, the starting load is around that anyway. Well certainly reducing by two grains down to 12, if the MAX is 14 is not "inventing your own load", its simply common sense way to approach a "new" load in a particular gun.
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