Although MatchKing® and Tipped MatchKing® bullets are commonly used for varmint hunting, their design will not provide the same reliable explosive expansion at equivalent velocities in varmints compared to their lightly jacketed Hornet, Blitz or Varminter counterparts. w/ a 220 Horn. It has quite a few 300 blk load offerings it. In recent months, Sierra has unveiled four very serious, ultra-high-BC MatchKing bullets in .224, .264 (6.5 mm), and .308 calibers. For example my 308 from zero at 100 is exactly 5MIL (yes MIL not MIN) low with subsonic, 200, another 5.5 MIL, and at 300, another 5.5 MIL.
Powered by UBB.threads™ PHP Forum Software 7.7.3. I'd expect your load with that bullet to be 10.5-11.0 with that specific bullet to the the number needed for the desired velocity. Typically, 308 Wins are 1:12" and the heaviest slug you see commercially is a 200 grain and even then, they are marginal. Please Update your browser for the best experience. The round nose bullets are normally much shorter and need less spin to remain stable. HPBT and it's a subsonic load. I would attempt to test case capacity first. Keeping the long-range design in mind, we built this bullet with a longer ogive, smaller meplat and improved boat tail to preserve downrange efficiency, enhance accuracy, and reduce wind-drift. Seated to the canelure. Competitive shooters have relied on the consistent accuracy of Sierra's MatchKings® for decades, resulting in a history of state, national and world records that is the envy of our competitors. FN 250 gr. RE-22 Velocity of 2900 fps. 41.5 gr. I've had great success with the 190 gr Nosler BTHP( relatively inexpensive bulk price) over 10.5 grs of Trailboss. In 1995, Sierra worked with military ordnance experts to produce a superior long-range bullet for the M21, M24 and M40A1 sniper systems.
47.5 gr. groups range from .375" to .50" So much for a 1 in 12" being too slow for a 220 gr.
HPBT MatchKing. When dealing with a set velocity limitation, such as we are with subsonic rounds, the only thing that changes with weight, is energy. The powder I'm using is Accurate 1680. I guess I was misunderstood. It looks like on had to use 14.5 and the other 13's. I always start high and work down shooting over a chrono at 50 yards without the can on first to make sure there is no key holing. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
SBT .338 Diameter Bullets 215 gr. Hodgdon's 2013 Annual Manual only lists one load with H110 and Sie 220 gr. It looks like you're using an older web browser. This bullet (2240) requires a barrel twist rate of 1×10” or faster. I didnt have any luck with boat tails. I would love to see your results and what you learned along the way.