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Rifles, Reloading, Optics, Equipment
Reloading
Second opinion on seating depth
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<blockquote data-quote="SHAGGY101" data-source="post: 1123304" data-attributes="member: 84110"><p>So I just started loading some 190gr Berger VLDs for my rem 700 in 06. Instead of just selecting a middle of the road seating depth and shooting a couple of ladders I decided to try seating depth first. I heard that VLDs with the secant ogive could be a little unforgiving with seating depth and it might be best to find a depth that works ok before shooting a ladder. I did the test accoroding to what's on bergers website. I used hornady brass, sorted for weight, pockets uniformed and fh debuted, all trimmed to 2.5", bumped .002 from chamber size, .001 press on bullet, wlr primers, no crimp, and 54.3gr IMR4350 from an RCBS Chargemaster. </p><p></p><p>I found my lands at 2.814 o-b for the VLDs. This leaves me with .183" of shank in the neck. I then followed bergers test using .010", .050", .090", and .130" off the lands. Concentricity was measured with Sinclair tool at intersection of ogive and shank to +-.003 to +-.001 for the longer seated bullets and shorter ones respectively. </p><p></p><p>Rifle was cleaned of copper and carbon between strings with five fouling shots before shooting test loads. 54.3 of IMR 4350 was used for a light, safe load for this new load. After shooting the test (started raining so I only got a few velocities) I expected to see a clear victor but was a little confused. What I saw were consistency issues. I think this may be due to concentricity issues with just having so little shank seated. .010 was by far the best group. But not consistently. However, .090 showed excellent consistency just not the best group. My gut tells me to use .090 from the lands to start with but I really like the other group. </p><p></p><p>Thoughts?</p><p></p><p>.010" from lands</p><p></p><p><a href="http://s1131.photobucket.com/user/SHAGGYbandsaw/media/Mobile%20Uploads/image_zps0w33qsfw.jpg.html" target="_blank"><img src="http://i1131.photobucket.com/albums/m555/SHAGGYbandsaw/Mobile%20Uploads/image_zps0w33qsfw.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>.050" from lands</p><p></p><p><a href="http://s1131.photobucket.com/user/SHAGGYbandsaw/media/Mobile%20Uploads/image_zpsxqrokiwq.jpg.html" target="_blank"><img src="http://i1131.photobucket.com/albums/m555/SHAGGYbandsaw/Mobile%20Uploads/image_zpsxqrokiwq.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>.090" from lands</p><p></p><p><a href="http://s1131.photobucket.com/user/SHAGGYbandsaw/media/Mobile%20Uploads/image_zpswtvcsvsj.jpg.html" target="_blank"><img src="http://i1131.photobucket.com/albums/m555/SHAGGYbandsaw/Mobile%20Uploads/image_zpswtvcsvsj.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>.130" from lands</p><p></p><p><a href="http://s1131.photobucket.com/user/SHAGGYbandsaw/media/Mobile%20Uploads/image_zpsunmhpyzf.jpg.html" target="_blank"><img src="http://i1131.photobucket.com/albums/m555/SHAGGYbandsaw/Mobile%20Uploads/image_zpsunmhpyzf.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p></blockquote><p></p>
[QUOTE="SHAGGY101, post: 1123304, member: 84110"] So I just started loading some 190gr Berger VLDs for my rem 700 in 06. Instead of just selecting a middle of the road seating depth and shooting a couple of ladders I decided to try seating depth first. I heard that VLDs with the secant ogive could be a little unforgiving with seating depth and it might be best to find a depth that works ok before shooting a ladder. I did the test accoroding to what's on bergers website. I used hornady brass, sorted for weight, pockets uniformed and fh debuted, all trimmed to 2.5", bumped .002 from chamber size, .001 press on bullet, wlr primers, no crimp, and 54.3gr IMR4350 from an RCBS Chargemaster. I found my lands at 2.814 o-b for the VLDs. This leaves me with .183" of shank in the neck. I then followed bergers test using .010", .050", .090", and .130" off the lands. Concentricity was measured with Sinclair tool at intersection of ogive and shank to +-.003 to +-.001 for the longer seated bullets and shorter ones respectively. Rifle was cleaned of copper and carbon between strings with five fouling shots before shooting test loads. 54.3 of IMR 4350 was used for a light, safe load for this new load. After shooting the test (started raining so I only got a few velocities) I expected to see a clear victor but was a little confused. What I saw were consistency issues. I think this may be due to concentricity issues with just having so little shank seated. .010 was by far the best group. But not consistently. However, .090 showed excellent consistency just not the best group. My gut tells me to use .090 from the lands to start with but I really like the other group. Thoughts? .010" from lands [URL=http://s1131.photobucket.com/user/SHAGGYbandsaw/media/Mobile%20Uploads/image_zps0w33qsfw.jpg.html][IMG]http://i1131.photobucket.com/albums/m555/SHAGGYbandsaw/Mobile%20Uploads/image_zps0w33qsfw.jpg[/IMG][/URL] .050" from lands [URL=http://s1131.photobucket.com/user/SHAGGYbandsaw/media/Mobile%20Uploads/image_zpsxqrokiwq.jpg.html][IMG]http://i1131.photobucket.com/albums/m555/SHAGGYbandsaw/Mobile%20Uploads/image_zpsxqrokiwq.jpg[/IMG][/URL] .090" from lands [URL=http://s1131.photobucket.com/user/SHAGGYbandsaw/media/Mobile%20Uploads/image_zpswtvcsvsj.jpg.html][IMG]http://i1131.photobucket.com/albums/m555/SHAGGYbandsaw/Mobile%20Uploads/image_zpswtvcsvsj.jpg[/IMG][/URL] .130" from lands [URL=http://s1131.photobucket.com/user/SHAGGYbandsaw/media/Mobile%20Uploads/image_zpsunmhpyzf.jpg.html][IMG]http://i1131.photobucket.com/albums/m555/SHAGGYbandsaw/Mobile%20Uploads/image_zpsunmhpyzf.jpg[/IMG][/URL] [/QUOTE]
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