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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What do I do now???
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<blockquote data-quote="Guest" data-source="post: 29179"><p>Heres the deal...Getting 1.5 MOA from a sub 1/2 MOA rifle...</p><p>I know the rifle is OK, as it shoots the original load under 1/2 MOA(75 gr VMAX), and I'm wondering what I should change with the new load first...</p><p>Cal. .257 DGR 1:12" tw</p><p>Load.. 100 gr Nosler BT</p><p>46.0 gr H4350</p><p>Federal 210M primer</p><p>I tried several different charge weights and seating depths, and best seemed to be the 46.0gr weight and .015" off the lands. This load is giving me three or four in sub-.75" groups, but the fourth or fifth shot always opens the group up to around 1.5"....I'm not sure whether to change the powder or the bullet first...</p><p>The barrel is a #5.5 taper(fairly heavy) and isn't getting too hot. I wait until the barrel cools until it is warm to the touch before I continue firing. It is fully floated and is bedded in a McMillan stock, the screws are all torqued with a torque wrench and the scope is a NF NXS. </p><p>The groups don't really have a particular shape, although they aren't stringing vertically. </p><p>I'm thinking that a switch to R19 or N560 might be the ticket. I also have some Winchester primers, but I have yet to have a problem with Federals...</p></blockquote><p></p>
[QUOTE="Guest, post: 29179"] Heres the deal...Getting 1.5 MOA from a sub 1/2 MOA rifle... I know the rifle is OK, as it shoots the original load under 1/2 MOA(75 gr VMAX), and I'm wondering what I should change with the new load first... Cal. .257 DGR 1:12" tw Load.. 100 gr Nosler BT 46.0 gr H4350 Federal 210M primer I tried several different charge weights and seating depths, and best seemed to be the 46.0gr weight and .015" off the lands. This load is giving me three or four in sub-.75" groups, but the fourth or fifth shot always opens the group up to around 1.5"....I'm not sure whether to change the powder or the bullet first... The barrel is a #5.5 taper(fairly heavy) and isn't getting too hot. I wait until the barrel cools until it is warm to the touch before I continue firing. It is fully floated and is bedded in a McMillan stock, the screws are all torqued with a torque wrench and the scope is a NF NXS. The groups don't really have a particular shape, although they aren't stringing vertically. I'm thinking that a switch to R19 or N560 might be the ticket. I also have some Winchester primers, but I have yet to have a problem with Federals... [/QUOTE]
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