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Rifles, Reloading, Optics, Equipment
Reloading
WTK: Hornady 175 Sub-X load Data for 300 BO
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<blockquote data-quote="Okanogan" data-source="post: 3037379" data-attributes="member: 90397"><p>My Hornady ap only lists a 190 gr Sub-x bullet for 30 cal.</p><p></p><p>Here are my subsonic loads for 300 BO, 7" barrel, suppressed with about 1050 fps</p><p></p><p>190 subx 13.0g AA1680, 2.081 COAL CCI 41</p><p>225 Hornady Match, 12.5g CFE BLK 2.203 COAL CC41</p><p></p><p>I found loading subsonic for the 300 BO to be very sensitive to seating depth, especially with CFE BLK. I get the best results with little to no free volume in the case. To tune in on the seating depth, I put the charge weight in a case that has been fired and not resized or decapped. I then find the seating depth based on where the bullet rests lightly on the charge. This method was suggested in some older thread on this forum. If you search around some you should be able to find some good information on loading subs on older threads on the forum.</p><p></p><p>I would recommend trying to borrow a chronograph for your efforts to insure you're getting consistent velocity with a reasonable SD/ES. In someways, shooting subsonic in kind of like shooting long range or with a .22 LR where you get a lot of drop fairly quickly over distance so variation in velocity results in vertical stringing.</p></blockquote><p></p>
[QUOTE="Okanogan, post: 3037379, member: 90397"] My Hornady ap only lists a 190 gr Sub-x bullet for 30 cal. Here are my subsonic loads for 300 BO, 7" barrel, suppressed with about 1050 fps 190 subx 13.0g AA1680, 2.081 COAL CCI 41 225 Hornady Match, 12.5g CFE BLK 2.203 COAL CC41 I found loading subsonic for the 300 BO to be very sensitive to seating depth, especially with CFE BLK. I get the best results with little to no free volume in the case. To tune in on the seating depth, I put the charge weight in a case that has been fired and not resized or decapped. I then find the seating depth based on where the bullet rests lightly on the charge. This method was suggested in some older thread on this forum. If you search around some you should be able to find some good information on loading subs on older threads on the forum. I would recommend trying to borrow a chronograph for your efforts to insure you're getting consistent velocity with a reasonable SD/ES. In someways, shooting subsonic in kind of like shooting long range or with a .22 LR where you get a lot of drop fairly quickly over distance so variation in velocity results in vertical stringing. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
WTK: Hornady 175 Sub-X load Data for 300 BO
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