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Rifles, Reloading, Optics, Equipment
Reloading
Does seating depth a have this large impact on group size?
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<blockquote data-quote="Bigeclipse" data-source="post: 1136693" data-attributes="member: 52437"><p>Normally I would do a full load development (ladder testing...etc) but since my wife will only be shooting to 300 yards and more likely under 150 yards and I did not have time to do a full work up I decided to roll the dice and try to find a quick load around 1MOA. once I sorted the original issue out of the scope base screw touching the barrel, I then did an initial pressure test to book max at .010 off the lands to make sure safety. Then tested the book max load at .010 off the lands to see what the barrel did. This load gave me ~1inch group at 100 yards. I then did book max and .5 grain less at .020 off lands just to see what happens. The groups shrunk to half inch and .75 inches. This was great and I simply called it good. I was shocked to see such an awful group this weekend. The first thing that came to mind was scope mounts until I found my calipers were not zeroed. I was still suspicious of my scope mounts since the group was sooo awful but wanted to see if anyone else has seen a group this bad solely to seating depth change.</p></blockquote><p></p>
[QUOTE="Bigeclipse, post: 1136693, member: 52437"] Normally I would do a full load development (ladder testing...etc) but since my wife will only be shooting to 300 yards and more likely under 150 yards and I did not have time to do a full work up I decided to roll the dice and try to find a quick load around 1MOA. once I sorted the original issue out of the scope base screw touching the barrel, I then did an initial pressure test to book max at .010 off the lands to make sure safety. Then tested the book max load at .010 off the lands to see what the barrel did. This load gave me ~1inch group at 100 yards. I then did book max and .5 grain less at .020 off lands just to see what happens. The groups shrunk to half inch and .75 inches. This was great and I simply called it good. I was shocked to see such an awful group this weekend. The first thing that came to mind was scope mounts until I found my calipers were not zeroed. I was still suspicious of my scope mounts since the group was sooo awful but wanted to see if anyone else has seen a group this bad solely to seating depth change. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Does seating depth a have this large impact on group size?
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