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Load Tuning By Jerry Teo
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<blockquote data-quote="devins" data-source="post: 442887" data-attributes="member: 27441"><p>Phorwath and MikeCR, I am really enjoying your points. You both bring up some great methods of isolating variables and relying on your known constants. I wish I had both of you right here with me to work up the new .260 AI that is hopefully out of the shop tomorrow. I am pretty good at math and statistics. Loved calculus. Physics was a blast that is why I seem to pour over all of this stuff. But even with what you all have pointed out, there are still variables that have not been isolated or controlled. Hence the "work up" right? For instance I developed a load for my 7mm Rem Mag very much like the article and fell right on the sweet load and the "factory gun" will shoot < .310 outside diameter groups at 100 yds. Move to my Mark V in .270 Win and at how many months of development before I get to acknowledge that the factory load shoots better than anything I can come up with. Throat length? So my question is, considering that I totally agree with both of you and see your points depending upon my situation(how? because I can't get the ideal length of my cartridge in every rifle I own because of magazine length, and I know, I know I can change that), so what is the best way to start? Maybe like on my old 17 enfield that had been sporterized and reemed to 308 Norma Mag. I found the nodes and adjusted in the second node until, with the bullet I am going to use in Namibia, I am shooting sub MOA. Pretty good for a 92 year old lady(the enfield is 92), but factory 180 gr Oryx shoots 1/2 MOA. Again I was limited in my case length room. But the factory shoot better and are at a set length. I guess there are as many variables as there are shooters setting up rifles, shooting different types of targets or game, at different "long ranges?" So I guess it boils down to if we have the luxery of adjusting our OACL we want to find it before we ladder and if not, we can ladder and then tweak the case length? Thanks to you both for your input and keeping it interesting. </p><p> </p><p>Also my quotation marks around long range acknowledges that some of the rifles mentioned above would not be considered long range shooters by everyone. And therefore load development not as exacting but it is done with the challenge of making each one shoot the best I can under the circumstances and in some cases the results are not bad.</p></blockquote><p></p>
[QUOTE="devins, post: 442887, member: 27441"] Phorwath and MikeCR, I am really enjoying your points. You both bring up some great methods of isolating variables and relying on your known constants. I wish I had both of you right here with me to work up the new .260 AI that is hopefully out of the shop tomorrow. I am pretty good at math and statistics. Loved calculus. Physics was a blast that is why I seem to pour over all of this stuff. But even with what you all have pointed out, there are still variables that have not been isolated or controlled. Hence the "work up" right? For instance I developed a load for my 7mm Rem Mag very much like the article and fell right on the sweet load and the "factory gun" will shoot < .310 outside diameter groups at 100 yds. Move to my Mark V in .270 Win and at how many months of development before I get to acknowledge that the factory load shoots better than anything I can come up with. Throat length? So my question is, considering that I totally agree with both of you and see your points depending upon my situation(how? because I can't get the ideal length of my cartridge in every rifle I own because of magazine length, and I know, I know I can change that), so what is the best way to start? Maybe like on my old 17 enfield that had been sporterized and reemed to 308 Norma Mag. I found the nodes and adjusted in the second node until, with the bullet I am going to use in Namibia, I am shooting sub MOA. Pretty good for a 92 year old lady(the enfield is 92), but factory 180 gr Oryx shoots 1/2 MOA. Again I was limited in my case length room. But the factory shoot better and are at a set length. I guess there are as many variables as there are shooters setting up rifles, shooting different types of targets or game, at different "long ranges?" So I guess it boils down to if we have the luxery of adjusting our OACL we want to find it before we ladder and if not, we can ladder and then tweak the case length? Thanks to you both for your input and keeping it interesting. Also my quotation marks around long range acknowledges that some of the rifles mentioned above would not be considered long range shooters by everyone. And therefore load development not as exacting but it is done with the challenge of making each one shoot the best I can under the circumstances and in some cases the results are not bad. [/QUOTE]
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