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Rifles, Reloading, Optics, Equipment
Reloading
Ran into a problem with 338 Lapua
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<blockquote data-quote="Nimrodmar10" data-source="post: 622709" data-attributes="member: 36369"><p>I'm working on new loads for a new Remington 700P in 338 Lapua Mag. I'm working on two different loads for the Sierra 250 gr. Match King and the Berger 300 gr. OTM Hybrid. I've got good loads for both bullets and am just trying to squeeze the last bit of accuracy out of them by trying different OALs. The dies I'm using are the Redding Type S bushing dies. The seating die is just a normal seating die, no micrometer. When trying to set groups of 5 shells to the same seating depth I noticed the OAL was varying up to .015" between bullets. I wasn't too surprised as I figured it was just small differences in the meplat. So I broke out the bullet comparator(six-sided nut with holes on each side). Still had the same problem. Shell length from base to bearing surface still varied 5-7 thousandths on the Berger and 10-15 thousandths on the Sierras. It's a little hard to change your OAL by .010" when you're getting. 015" difference between bullets. I even took the seating plug out of the die and used it as a comparator by placing a bullet in the recess and measuring the length of the two together. Had the same amount of difference.</p><p></p><p>The Sierra 250 gr. with a Max load of H1000 is shooting less than .5" and the Berger 300 gr. Hybrids with a Max load of Retumbo is shooting. 75" groups. Those are not bad groups but I wonder how good they'd be if the bullets were uniform.</p><p></p><p>Okay, here's the question, Has anyone else noticed this and does it matter with accuracy? Would it help to use a comparator and try to seperate them in groups of the same length from base to bore diameter?</p><p></p><p>You'd think that with what we pay for these premium bullets they'd be more precise. Just saying!</p></blockquote><p></p>
[QUOTE="Nimrodmar10, post: 622709, member: 36369"] I'm working on new loads for a new Remington 700P in 338 Lapua Mag. I'm working on two different loads for the Sierra 250 gr. Match King and the Berger 300 gr. OTM Hybrid. I've got good loads for both bullets and am just trying to squeeze the last bit of accuracy out of them by trying different OALs. The dies I'm using are the Redding Type S bushing dies. The seating die is just a normal seating die, no micrometer. When trying to set groups of 5 shells to the same seating depth I noticed the OAL was varying up to .015" between bullets. I wasn't too surprised as I figured it was just small differences in the meplat. So I broke out the bullet comparator(six-sided nut with holes on each side). Still had the same problem. Shell length from base to bearing surface still varied 5-7 thousandths on the Berger and 10-15 thousandths on the Sierras. It's a little hard to change your OAL by .010" when you're getting. 015" difference between bullets. I even took the seating plug out of the die and used it as a comparator by placing a bullet in the recess and measuring the length of the two together. Had the same amount of difference. The Sierra 250 gr. with a Max load of H1000 is shooting less than .5" and the Berger 300 gr. Hybrids with a Max load of Retumbo is shooting. 75" groups. Those are not bad groups but I wonder how good they'd be if the bullets were uniform. Okay, here's the question, Has anyone else noticed this and does it matter with accuracy? Would it help to use a comparator and try to seperate them in groups of the same length from base to bore diameter? You'd think that with what we pay for these premium bullets they'd be more precise. Just saying! [/QUOTE]
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Ran into a problem with 338 Lapua
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