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3rd shot flyer???
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<blockquote data-quote="Hired Gun" data-source="post: 105895" data-attributes="member: 1290"><p>You're on the right path. I like the jam method for finding the lands. The blackened deal gives false results as the bullet is flopping around in there and will leave land marks long before it is anywhere near coming up tight. That said, on Weatherby's, I have not had any luck seating long so I just stick to a good round number that functions flawlessly. What is your overall length? </p><p></p><p>I also find my max load in .5 increments but then once I find it I do up 3 shots for group in loads above and below it in .1 increments to find the very best sweet spot. For example, right now I'm doing up 200 grain Accubonds for my 300 Wby Accumark. I tested from 83 to 85.5 in .5 grain increments. It started out at a 83 grains (3025fps ave)the group was 1.25 and continued to shrink to 85.5 grains (3133fps ave) that went into a .6" inch group. Now I'm retesting it from 85.3 to 86 grains even in .1 increments. Then I will try 2 more powders all over again to see if it can be improved. In my Weatherby's the IMR-7828 usually wins out in accuracy and extreme spreads in the single digits for 10 shots. I have never tried the Ramshot Magnum so I want to try that. I really like ball powders when I can use them. Using this method I got my super skinny 7.5 pound German Deluxe 300 Wby to shoot a .291" inch 3 shot group and my 2 257 Wby Accumarks stay under .5's most of the time if I do my part.</p></blockquote><p></p>
[QUOTE="Hired Gun, post: 105895, member: 1290"] You're on the right path. I like the jam method for finding the lands. The blackened deal gives false results as the bullet is flopping around in there and will leave land marks long before it is anywhere near coming up tight. That said, on Weatherby's, I have not had any luck seating long so I just stick to a good round number that functions flawlessly. What is your overall length? I also find my max load in .5 increments but then once I find it I do up 3 shots for group in loads above and below it in .1 increments to find the very best sweet spot. For example, right now I'm doing up 200 grain Accubonds for my 300 Wby Accumark. I tested from 83 to 85.5 in .5 grain increments. It started out at a 83 grains (3025fps ave)the group was 1.25 and continued to shrink to 85.5 grains (3133fps ave) that went into a .6" inch group. Now I'm retesting it from 85.3 to 86 grains even in .1 increments. Then I will try 2 more powders all over again to see if it can be improved. In my Weatherby's the IMR-7828 usually wins out in accuracy and extreme spreads in the single digits for 10 shots. I have never tried the Ramshot Magnum so I want to try that. I really like ball powders when I can use them. Using this method I got my super skinny 7.5 pound German Deluxe 300 Wby to shoot a .291" inch 3 shot group and my 2 257 Wby Accumarks stay under .5's most of the time if I do my part. [/QUOTE]
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