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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
6.5 saum
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<blockquote data-quote="65WSM" data-source="post: 842788" data-attributes="member: 9551"><p>I like 65.5 to 66.5 gr of Retumbo with magnum primers behind 140 gr bullets and up to 68 gr of Retumbo (3170 fps) with 130 gr Nosler ABs (3280 fps). I have 2 different barrels, twists and lengths. I will send you my spreadsheet if you send me your e-mail. A full 3200 with 140 gr bullets is tough on primer pockets. I come from a background of pre-64 Model 70s in .264 Win Mag. I had two of them and wore out the factory and replacement Kriegers. The .264 Win Mag holds about 5 grains more powder to get the same pressure and will go faster than the 6.5 WSM in the same barrel. I wish I had Retumbo when I had my pre-64s instead of surplus 4831. I did back flips when Reloader 22 became available. The best they ever did was 1.25" at 100 yards with 3-9X scopes. </p><p></p><p>I have not worn out a nitrocarburized barrel yet. I am between 500 to 600 rounds so far through my one nitrocarburized barrel in this caliber. No signs of damage yet. It is fun to clean -- so smooooth. I can get under 4 inch groups at the 550 length of my club range with a 8-32X56 Black Diamond. My synthetic stocked (MPI) Model 70 weighs 7.6 pounds with a 2.5-10X32 scope and sling ready to hunt. Add more weight for a load development scope. The Highwall weighs 2 pounds more but some of that is scope.</p><p></p><p>I have a 6.5-284 that is in the Riflesmiths vise today to be rebarreled. The current Bartlein 5-r gain twist is being replaced at about 850 rounds. I think that 1200 rounds is optimistic if they go at hunting speed. I can get 130 ABs in the 6.5-284 to go just as fast as out of the 6.5 WSM with VV N560 powder. I will nitrocarburize the replacement barrel.</p></blockquote><p></p>
[QUOTE="65WSM, post: 842788, member: 9551"] I like 65.5 to 66.5 gr of Retumbo with magnum primers behind 140 gr bullets and up to 68 gr of Retumbo (3170 fps) with 130 gr Nosler ABs (3280 fps). I have 2 different barrels, twists and lengths. I will send you my spreadsheet if you send me your e-mail. A full 3200 with 140 gr bullets is tough on primer pockets. I come from a background of pre-64 Model 70s in .264 Win Mag. I had two of them and wore out the factory and replacement Kriegers. The .264 Win Mag holds about 5 grains more powder to get the same pressure and will go faster than the 6.5 WSM in the same barrel. I wish I had Retumbo when I had my pre-64s instead of surplus 4831. I did back flips when Reloader 22 became available. The best they ever did was 1.25" at 100 yards with 3-9X scopes. I have not worn out a nitrocarburized barrel yet. I am between 500 to 600 rounds so far through my one nitrocarburized barrel in this caliber. No signs of damage yet. It is fun to clean -- so smooooth. I can get under 4 inch groups at the 550 length of my club range with a 8-32X56 Black Diamond. My synthetic stocked (MPI) Model 70 weighs 7.6 pounds with a 2.5-10X32 scope and sling ready to hunt. Add more weight for a load development scope. The Highwall weighs 2 pounds more but some of that is scope. I have a 6.5-284 that is in the Riflesmiths vise today to be rebarreled. The current Bartlein 5-r gain twist is being replaced at about 850 rounds. I think that 1200 rounds is optimistic if they go at hunting speed. I can get 130 ABs in the 6.5-284 to go just as fast as out of the 6.5 WSM with VV N560 powder. I will nitrocarburize the replacement barrel. [/QUOTE]
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