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Rifles, Reloading, Optics, Equipment
Reloading
OAL and FPS
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<blockquote data-quote="6.5x300" data-source="post: 275411" data-attributes="member: 10713"><p>Hey guys need some advise here as I had an interesting discovery shooting today. I found that as I seated the bullet deeper shortening the OAL my fps dropped. This seemed like backwords logic to me as I would have thought the fps would increase from less space in the case for powder to expand. What may explane this outcome is that I started with the bullet seated into the lands and the more the bullet jumped the less the fps.</p><p> </p><p>My equipment was .338 edge with 30 pac-nor savage 110 action fire formed nosler 300 RUM brass 92 H-1000 CCI 250 primer. All grouped less then .6 as I'm still practicing and usuall get that one flier.</p><p> </p><p>OAL 3.965 = 2885 fps ( maybe .05 into the lands I'll have to check)</p><p>OAL 3.910 = 2870 fps (not in the lands so the .05 would be about right)</p><p>OAL 3.875 = 2870 fps</p><p>OAL 3.840 = 2855 fps (best group .3)</p><p> </p><p>Also got the same results from my M94 6.5X55 sweed</p><p>Norma brass max load of RL 22 CCI BR primer Hornady 140 SST </p><p> </p><p>OAL 3.210 = 2545 fps</p><p>OAL 3.375 = 2605 fps (not quite touching the lands, rifleing, groves, you know what I mean)</p><p> </p><p>Kind of curious as to everyones thoughts on this.</p><p> </p><p>Thanks,</p><p> </p><p>BT Sniper</p><p> </p><p>Shot .3 with the edge, the 6.5 I need to work on<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="6.5x300, post: 275411, member: 10713"] Hey guys need some advise here as I had an interesting discovery shooting today. I found that as I seated the bullet deeper shortening the OAL my fps dropped. This seemed like backwords logic to me as I would have thought the fps would increase from less space in the case for powder to expand. What may explane this outcome is that I started with the bullet seated into the lands and the more the bullet jumped the less the fps. My equipment was .338 edge with 30 pac-nor savage 110 action fire formed nosler 300 RUM brass 92 H-1000 CCI 250 primer. All grouped less then .6 as I'm still practicing and usuall get that one flier. OAL 3.965 = 2885 fps ( maybe .05 into the lands I'll have to check) OAL 3.910 = 2870 fps (not in the lands so the .05 would be about right) OAL 3.875 = 2870 fps OAL 3.840 = 2855 fps (best group .3) Also got the same results from my M94 6.5X55 sweed Norma brass max load of RL 22 CCI BR primer Hornady 140 SST OAL 3.210 = 2545 fps OAL 3.375 = 2605 fps (not quite touching the lands, rifleing, groves, you know what I mean) Kind of curious as to everyones thoughts on this. Thanks, BT Sniper Shot .3 with the edge, the 6.5 I need to work on:) [/QUOTE]
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