![]() The cases are primed with Federal GM205M primers and charged with VihtaVuori N140 powder and as mentioned above, the T1 projectile is seated to a COAL of 2.245”. Don't even view this information in the presence of children or small animals.įor this hand-load of the Hornady 75 grain BTHP bullet, I use virgin Lake City brass that has been weight-sorted, match-prepped and neck-sized. Usage of this information for the actual loading of ammunition may result in malfunctions, damage and destruction of property and grave injury or death to beings human in nature or otherwise. No warranty, guarantee or assurance that these loads are safe is stated, suggested or implied nor should any be inferred. It is not intended to be used for the actual loading of ammunition by the reader. The information provided here is for educational purposes only. Reloading is an inherently dangerous activity. These figures are contingent upon a variety of variables, such as the particular chamber reamer that was used for your barrel, the number of rounds that have been fired through your barrel when the measurement is obtained, the particular lot of bullets used and whether you use a virgin case, a fired case, a resized case or a head-space gauge to obtain this measurement. The jump to the lands figures stated above where obtained using a Sinclair bullet seating depth gauge and a Forster 223 Remington 1.4636” head-space gauge. When fired from a Larue Stealth barrel with a 223 Wylde chamber, this COAL will create a jump to the lands of 115 thousandths of an inch and when fired from a Krieger barrel with a 223 Remington chamber, this COAL will create a jump to the lands of 78 thousandths of an inch. When fired from a Colt SOCOM barrel with a 5.56mm NATO chamber, this COAL will create a jump to the lands of 178 thousandths of an inch. The lot of T1 projectiles used for this article have a nominal length of 0.988” and I load them to a nominal COAL of 2.245”. ![]() According to Ballistic Performance of Rifle Bullets by Bryan Litz, the Hornady 75 grain BTHP has an average G1 ballistic coefficient of 0.356 and an average G7 ballistic coefficient of 0.183. 338BR and the 510 W though.I use the Hornady 75 grain BTHP bullet to load match-grade hand-loads for my semi-automatic AR-15s chambered in 5.56mm/223 Remington. 338LM, 6.5X47, 308 etc through cans and it works great. This is just my opinion based on quite a few years of playing with subsonics and suppressors. That way you can take care of any close in stuff quietly and save a lot of time on loading a basic 22LR equivalent in your rifle. I know some guys think they should have subs for any gun they carry with a can but it makes more sense to carry a suppressed. You've got a 300gr subsonic telephone pole coming out of the barrel and with good loading and workup with your rifle you can hit dogs out to 500yds with a heavy bullet and do it quietly. 338 BR upper on might make it worth doing. On the other hand taking your AR and putting a. You don't gain enough with the subs to make it worthwhile when you're limited to. I think more realistically you build a dedicated subsonic rifle and just shoot regular HV ammo out of your.
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