Deleted
Deleted Member
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Post by Deleted on Aug 18, 2013 15:47:19 GMT -8
I have been asked more than once about seating depth. Since I have been working with a new 264 LBC, I thought it would be a good idea to show how changes in seating depth effects accuracy. The following 4 targets show how the group changes when nothing is changed except the distance the bullet starts from the rifling. The load is 123 gr Nosler Custom Competition XX.X grains CFE 223 CCI 450 primer Lapua 220 Russian brass reformed Here is the test rifle. The first target is the bullet seated to touch the rifling. Not jammed, but just touching. There are 2 bullets in the hole on the right. This target has the bullet .005 off the rifling. .015 off the rifling. This looks like the sweet spot, but I will reshoot this load and move the bullet .003 each way and compare those targets and go with the smallest combination. .030 off the rifling. There will probably be another sweet spot between here and .060 but at this point it is just using case capacity.
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djmfl
Senior Member
Posts: 118
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Post by djmfl on Aug 18, 2013 16:32:05 GMT -8
Ritch:
Many thanks. I just got my new .264lbc, standard profile, 20" barrel from Andy yesterday. Off to the range in a couple of weeks to break it in! Thanks so much for sharing this.
Don
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Post by overwatcher on Aug 26, 2013 9:10:33 GMT -8
Thanks for the info. Are you finding a "sweet spot" for a powder charge before you are finding a seating depth "sweet spot"?
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Post by GLSHOOTER on Aug 26, 2013 12:23:51 GMT -8
Powder first then the seating depth is worked with.
Greg
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