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Rifles, Reloading, Optics, Equipment
Reloading
257 weatherby 100 gr sierra sbt
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<blockquote data-quote="keithcandler" data-source="post: 1594698" data-attributes="member: 3728"><p>Ok, start your load development at 71g of R#22 with fed 215. I seated the bullets .010 off the lands, and shot small groups with only 12 rounds of load development.</p><p></p><p>With Zero freebore barrels I have had, 71.0,71.5, or 72g of R#22 with a 215 shot very tiny groups.</p><p></p><p>Key, keep the barrel cool with dousing the barrel with rubbing alcohol/Water on a wash cloth or shop towel...you want the water dripping off the bottom of the barrel.</p><p></p><p>Trigger on the mark V, needs work...address that issue also with gunsmith.</p><p></p><p>With the 100's, I sighted in 1/2" high at 200, and if memory is right, I was 3.5" low at 300. Lots of crows, coyotes, chucks just blew up. I had another load with the 87g Speer spt at 4130 with AA3100 that is no longer available...tiny groups.</p><p></p><p>I don't know how long the primer pockets will last. I also made brass from Winchester 7 Mag brass, just ran it through the full length sizer with some good lube, formed perfectly. The necks were a tad shorter, so you will have to watch for a carbon ring in the chamber if you go down this road. Carbon ring will "crimp" the bullet, spiking pressure.</p><p></p><p>I used this rifle as a hunting rifle, not as a target rifle. Verified zero after the initial load development, then the trigger was only pulled on hair. Zero freebore barrels last a while, unlike the normal throats with .300 freebore.</p><p></p><p>Best wishes</p></blockquote><p></p>
[QUOTE="keithcandler, post: 1594698, member: 3728"] Ok, start your load development at 71g of R#22 with fed 215. I seated the bullets .010 off the lands, and shot small groups with only 12 rounds of load development. With Zero freebore barrels I have had, 71.0,71.5, or 72g of R#22 with a 215 shot very tiny groups. Key, keep the barrel cool with dousing the barrel with rubbing alcohol/Water on a wash cloth or shop towel...you want the water dripping off the bottom of the barrel. Trigger on the mark V, needs work...address that issue also with gunsmith. With the 100's, I sighted in 1/2" high at 200, and if memory is right, I was 3.5" low at 300. Lots of crows, coyotes, chucks just blew up. I had another load with the 87g Speer spt at 4130 with AA3100 that is no longer available...tiny groups. I don't know how long the primer pockets will last. I also made brass from Winchester 7 Mag brass, just ran it through the full length sizer with some good lube, formed perfectly. The necks were a tad shorter, so you will have to watch for a carbon ring in the chamber if you go down this road. Carbon ring will "crimp" the bullet, spiking pressure. I used this rifle as a hunting rifle, not as a target rifle. Verified zero after the initial load development, then the trigger was only pulled on hair. Zero freebore barrels last a while, unlike the normal throats with .300 freebore. Best wishes [/QUOTE]
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Reloading
257 weatherby 100 gr sierra sbt
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