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Rifles, Reloading, Optics, Equipment
Reloading
Changing primers during load development?
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<blockquote data-quote="Spothogg32" data-source="post: 563322" data-attributes="member: 34158"><p>Well guys, I made it to the range today with some new loads that I worked up in .5gr increments using the fed gm210m primer and was very pleased with the results. I shot 5 different 5 shot strings with the 5 different loads and my ES improved a bunch I finally made it into the 12 to 15 fps range for 5 shots! I finished the day with my final load with a 180gr Berger VLD with 72gr of H1000 with a COAL of 3.540" and an avg. 5 shot velocity of 2972fps. My velocity with the CCI 250 magnum primer was only 36fps faster with the same charge. My groups were also holding right at 1/2 MOA or less for 5 shots. An other interesting thing I noticed is the primers on all 25 cartridges had not really started to flatten they just had the primer dent in them and that was basically it with no other signs of pressure! the CCI 250 primers were slightly flattened at the starting load of 70gr and stayed basically the same with the finishing load of 72gr. My next trip out I plan on loading up to 73gr to see if I can get back to the 3000+ fps that I was at before and see if I can maintain the 1/2 MOA accuracy. After that I plan on playing with my seating depth with the Bergers to see if I can get it closer to 1/4 MOA like I did with the 168gr Berger. For some reason the 168gr liked a bunch of jump start .o63" off the lands. Thanks for all of your input and good luck on all of your ventures!</p></blockquote><p></p>
[QUOTE="Spothogg32, post: 563322, member: 34158"] Well guys, I made it to the range today with some new loads that I worked up in .5gr increments using the fed gm210m primer and was very pleased with the results. I shot 5 different 5 shot strings with the 5 different loads and my ES improved a bunch I finally made it into the 12 to 15 fps range for 5 shots! I finished the day with my final load with a 180gr Berger VLD with 72gr of H1000 with a COAL of 3.540" and an avg. 5 shot velocity of 2972fps. My velocity with the CCI 250 magnum primer was only 36fps faster with the same charge. My groups were also holding right at 1/2 MOA or less for 5 shots. An other interesting thing I noticed is the primers on all 25 cartridges had not really started to flatten they just had the primer dent in them and that was basically it with no other signs of pressure! the CCI 250 primers were slightly flattened at the starting load of 70gr and stayed basically the same with the finishing load of 72gr. My next trip out I plan on loading up to 73gr to see if I can get back to the 3000+ fps that I was at before and see if I can maintain the 1/2 MOA accuracy. After that I plan on playing with my seating depth with the Bergers to see if I can get it closer to 1/4 MOA like I did with the 168gr Berger. For some reason the 168gr liked a bunch of jump start .o63" off the lands. Thanks for all of your input and good luck on all of your ventures! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Changing primers during load development?
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