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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
OK.....I am a believer. 308/RL-17/208 AMAX = sweet spot
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<blockquote data-quote="Michael Eichele" data-source="post: 1016501" data-attributes="member: 1007"><p>1: Shooting Chrony</p><p>2: As close to sea level as possible without getting wet</p><p>3: Was early March so likely around 35-45 degrees</p><p>4: 26" 11x</p><p></p><p>I find that for 168-185 grains, VV N540 is fabulous. 2850 with the 178 amax is a breeze in my 26" barrels. It takes 50 grains of 17 to get the 168 up to 2900. It only takes 46-48 N540 to get the 168 vld up to 2950 and it settles in the case much better so it's not such a compressed load. Compressed loads are the nature of the beast when trying to get 200-215+ bullets up to impressive speeds but it doesn't need to be that way for 165-185s. 540 works with 190-210s but it's a bit too fast. N550 works well too but 46 grains of it gets pretty warm under the 208 and velocities are lower than with R17.</p><p></p><p>All things considered, I've moved away from R17 and N powders for the heavies. I'm sold on the use of H4350 in the Palma case. I loose about 100'sec with the 210s over R17 but it's been accurate in multiple barrels, is temp stable and the extreme spreads are stupid low. Pressure signs are non existent even with powder up to the neck under 215s. I'm getting 2600+ with 210s and H4350. 2600 with 210s in a 308 is nothing to sneeze at. When I run the numbers with the 210ABLR at 2600'sec (.650g1), 5000' and 60 degrees where I do most of my hunting, the numbers are amazing.</p><p></p><p>PLEASE start at lower charge weights than any you see here and work up.</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 1016501, member: 1007"] 1: Shooting Chrony 2: As close to sea level as possible without getting wet 3: Was early March so likely around 35-45 degrees 4: 26" 11x I find that for 168-185 grains, VV N540 is fabulous. 2850 with the 178 amax is a breeze in my 26" barrels. It takes 50 grains of 17 to get the 168 up to 2900. It only takes 46-48 N540 to get the 168 vld up to 2950 and it settles in the case much better so it's not such a compressed load. Compressed loads are the nature of the beast when trying to get 200-215+ bullets up to impressive speeds but it doesn't need to be that way for 165-185s. 540 works with 190-210s but it's a bit too fast. N550 works well too but 46 grains of it gets pretty warm under the 208 and velocities are lower than with R17. All things considered, I've moved away from R17 and N powders for the heavies. I'm sold on the use of H4350 in the Palma case. I loose about 100'sec with the 210s over R17 but it's been accurate in multiple barrels, is temp stable and the extreme spreads are stupid low. Pressure signs are non existent even with powder up to the neck under 215s. I'm getting 2600+ with 210s and H4350. 2600 with 210s in a 308 is nothing to sneeze at. When I run the numbers with the 210ABLR at 2600'sec (.650g1), 5000' and 60 degrees where I do most of my hunting, the numbers are amazing. PLEASE start at lower charge weights than any you see here and work up. [/QUOTE]
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OK.....I am a believer. 308/RL-17/208 AMAX = sweet spot
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