![]() I also do not recommend 220 gr bullets in 308. There is no payoff.Īll "published" (with a disclaimer) data available is here: There has been a lot of chatter on Internet sites lately about centerfire loads that fire bullets at subsonic velocities. I actually DO NOT recommend fooling around with slow cannon powders and duplex loads. develop subsonic velocities (left to right). For duplex loads in military calibers, the booster is generally up to 3 grains of your choice powder (Unique, 3031 are mentioned) until it does not leave a trail of black bits. It did go Bang, or, rather boooom with a slow push recoil. With no booster, it leaves a trail of black bits down the bore. I have tried WC872 in 308, with the 220 gr RN. I do not believe QL can predict duplex load results. You have trouble getting all of it to even burn. Lyman shows load data for 44, 55 and 60 grain bullets in 223. This slowness is a built-in pressure regulator. If I need more performance then I grab that rebarreled 1-22-250 or its twin in 220 Swift. It is slower than all commercially available powders. It does not list WC872, which was from pulled down 20mm Vulcan. Charge weight: 12.5 grains (this is NOT a compressed load never compress TB) Bullets: either the 210 grain Nosler RDF or the 220 grain Nosler CC (both bullets are about the same length 1.510') Primer: CCI Large Rifle Primers (200) COAL: SAAMI length correction > (Magpul) AICS mag length (2.87. cartridge load very close to the sound barrier, but. Neither the writer, The Firing Line, nor the staff of TFL assumes any liability for any damage or injury resulting from the use of this information. Technical specification and numerical data are given as an indication only. ![]() CAUTION: The following post includes loading data beyond or not covered by currently published maximums for this cartridge. 308 Subsonic loads Lapua case 2.005' Hornady 220 GN Round Nose Interlock Hodgdon Trail Boss 14.1 GN CCI LARGE PRIMERS OAL 2.735' TIKKA T3 TACTICAL 24'1:11 TWIST SEA LEVEL 83 FARENHEIT SPEED CHRONO 10FT 1.1082 FT/S 2.1102 3.1098 1/4 MOA AT 100Y HORNADYS 178 GN ELD-X LAPUA CASE 2.005' TRAIL BOSS 10.1 GN OAL 2.800' 1.1070 FT/S 2.1062 3.
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