Known as the Tipped MatchKing, or TMK, Black Hills is using these bullets in 5.56mm and 7.62mm ammunition. Sierra MatchKing bullets have very thin jackets and are held to exacting tolerances in diameter and weight. Ideal for 69-77 grain bullets . At the same time, I loaded Sierra 52 and 53 grain MK, with 26.7 and 27 grains Varget at 2.250 (as recommended by Sierra in the same article) with MUCH better results. However, at the next higher 'node' in powder load, primer pockets last 1 or 2 shots before blowing out of spec, and at this load, cases last teens of shots each. 2800 fps out of an 18" AR. Gorilla Ammunition utilizes only the highest quality components to manufacture top quality match grade loads and this offering chambered in 223 Remington with the Sierra MatchKing is no exception. We did NOT test every bullet with every powder, because its pointless. Sierra’s 6.5 mm (.264″) 123 and 142 grain MatchKings (SMK) are staples of the precision shooting world. The major advantage of adding a tip to the bullet is the reduction of drag, producing a more favorable ballistic coefficient. Sierra has designated the bullets as TMK, for Tipped MatchKing, and the new ballistic tipped bullets add to the company’s .224 caliber (5.69mm) and .308 caliber (7.62mm) offerings: New .224 Caliber Ballistic Tipped Bullets. .223 gel test: Black Hills 77 gr TMK, carbine & SBR Black Hills 77 gr Sierra Tipped Match King fired from 11.5" and 16" barreled AR pattern rifles … Sierra Ammo 77 Gr. BTW, for those interested in how these Tipped MatchKings compare to the standard MatchKings; according to my measurements: The 69 gr TMK is +8% compared to the SMK The 125 gr TMK is -5% compared to the SMK (which I believe was 'pointed' not tipped) According to Black Hills, the 77 gr TMK round will reliably fragments at 1900 fps velocity. ; 6.5-cal. Whether you're making bulk ammo for plinking, creating the perfect hunting round, or building the best ammunition for a 500 yard shot, Midsouth has the right Rifle Bullet for your Reloading recipe. I did a little research on the new GameChanger Sierra bullets. Rifles for the .223 utilize a wide range of rifling twist rates, from 1 twist in 7″ to 1 twist in 12″. I have tried the tipped matchking in 3 Rifles now and have not had good luck in any of them. TMK Velocity: 2750 FPS 50ct box The products offered for sale on this page can expose you to chemicals, including Lead, which are known to the State of California to cause cancer, birth defects or other reproductive harm. These Hollow Point Boat Tail bullets have a small meplat to produce a higher ballistic coefficient. A long time, when I was shooting an AR15 Hbar 1/7 twist .223 in matches I used to use AA2230 for the Sierra 69 gr MK with good results. or the Sierra 77 gr Match King (Mk262 Mod1). HPBT 168 gr. Varget/LC11 brass/CCI400 @ 2.260 COAL, even though that load "gently encourages them to leave the muzzle" at only 2740-ish fps. For a given bullet and twist rate, increasing velocity should improve stability, assuming the jacket remains intact. HPBT MatchKing 10” TWIST C.O.A.L. Both offer exceptional precision to the marksman, but a middle weight 6.5mm option eluded those of us who use their bullets until November 2015 with the introduction of the 130 grain Tipped MatchKing (TMK) part number 7430. I tested the 69 TMK and 70 RDF the same day, both on freshly cleaned barrels, from a front rest. Sierra has enhanced a segment of the MatchKing line by adding the acetal resin tip, thus crowning the Tipped MatchKing (TMK) bullet line. HPBT ... Easy, varget. ; and .27-cal. Black Hills first released information about this ammo back in February, shortly after SHOT Show 2014. TMK, Nosler 70-gr. This is a mfgr gel test of the 77gr at 1900fps. Bullets above 60 grains require fastertwists to provide the best accuracy. My baseline load is 69 SMKs in front of 24.2 gr. ArmaLite & Sig Test Platforms. HPBT Match 168 gr. I did notice a tremendous difference in drop between the Speer 64 gr. SBT 165 gr. Our Dual Performance™ line features a monolithic machined copper projectile that immediately begins expansion upon impact forming a temporary cavity exceeding the capability of conventional bullets. 140-gr. This article in "Rifle Shooter" says, "It’s much more than that and is almost undoubtedly the best big game bullet Sierra has ever produced". 90-gr. From the right they are .243-cal. PS you might measure the actual twist rate of the barrel, just for grins. TMK Velocity: 2750 FPS 50ct box The products offered for sale on this page can expose you to chemicals, including Lead, which are known to the State of California to cause cancer, birth defects or other reproductive harm. Sierra Ammo 77 Gr. Sierra has enhanced a segment of the MatchKing line by adding the acetal resin tip, thus crowning the Tipped MatchKing (TMK) bullet line. Heavy OTM bullets tend to perform pretty well in tissue, even though they are not designed with terminal performance in mind. 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.Sierra MatchKing… Handloads, from left: Nosler 35-gr. We we used these on many powders to test. 130-gr. Arduino mkr wifi 1010 serial For what its worth, Sierra's reccomended "accuracy" load for these 2 bullets was Viht.