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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Lapua .308 155 Scenar
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<blockquote data-quote="usmc1986" data-source="post: 411793" data-attributes="member: 24903"><p>WHAT????? Can't get there with a .308 155 bullet with a 24" barrel. I know folks reaching out to 1k with 22" - 18.5" barrels on steel with almost boring regularity. Although with 18.5" barrel it was the 175's. Not optimal but it will get hits on target.</p><p></p><p>A 24" barrel will be fine for 155's. The general rule is that you'll need to be in the 2900 fps range to keep especially the 155 Scenars happy,-they like to be pushed really hard. </p><p></p><p>Another thing to keep in mind is that some barrels are faster than others, even the same manufacturer with the same reamer, it just happens.</p><p></p><p> The key to safety is going to be your chamber and how much leade you have to keep pressures down. With a factory Rem 700 26" 1:12 barrel I was able to safely push 155 Scenars and 155 AMAX to 2950fps @ 1400 ASL with Varget. Remington is known to have loooong throats/leade and mine is no exception. It took to over max published loads with Win brass and Wolf LR primers to get me there. Lapua brass will take a few less grains than with Winchester and you probably have less leade in your barrel. If you can safely get an accurate node above 2850-2875 without primer flattening, I'd stick with that and shoot it. Much less than that speed and you won't compete with the ballistics to shooting 175's at longer ranges.</p><p></p><p>Hitting steel at long range doesn't require benchrest length barrels with benchrest level of accuracy. But it will require a high level of consistency and a firm grounding in fundamental marksmanship skills to consistently hit the target.</p></blockquote><p></p>
[QUOTE="usmc1986, post: 411793, member: 24903"] WHAT????? Can't get there with a .308 155 bullet with a 24" barrel. I know folks reaching out to 1k with 22" - 18.5" barrels on steel with almost boring regularity. Although with 18.5" barrel it was the 175's. Not optimal but it will get hits on target. A 24" barrel will be fine for 155's. The general rule is that you'll need to be in the 2900 fps range to keep especially the 155 Scenars happy,-they like to be pushed really hard. Another thing to keep in mind is that some barrels are faster than others, even the same manufacturer with the same reamer, it just happens. The key to safety is going to be your chamber and how much leade you have to keep pressures down. With a factory Rem 700 26" 1:12 barrel I was able to safely push 155 Scenars and 155 AMAX to 2950fps @ 1400 ASL with Varget. Remington is known to have loooong throats/leade and mine is no exception. It took to over max published loads with Win brass and Wolf LR primers to get me there. Lapua brass will take a few less grains than with Winchester and you probably have less leade in your barrel. If you can safely get an accurate node above 2850-2875 without primer flattening, I'd stick with that and shoot it. Much less than that speed and you won't compete with the ballistics to shooting 175's at longer ranges. Hitting steel at long range doesn't require benchrest length barrels with benchrest level of accuracy. But it will require a high level of consistency and a firm grounding in fundamental marksmanship skills to consistently hit the target. [/QUOTE]
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Lapua .308 155 Scenar
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