By Mark V. Lonsdale
The five month project rifle came to completion yesterday with the arrival of the UPS truck – a custom .375 H&H big game hunting rifle. This began back in June with the order of a Stiller’s Predator action, Bartlein #4 Bull Sporter barrel, a McMillan Tactical Hunter stock, and a Bix’N Andy Dakota trigger.
For anyone planning a custom build, it is recommend to order all the components at the same time since manufacture lead time and delivery can vary based on availability, demand, and time of year.
Break-in and testing will begin this week with an assortment of bullets, powders, and loads to include Hornady 270 grain Round Nose, Hornady 250 grain GMX, and Speer 270 grain BTSP, with Sierra and Barnes next week. Powders will include IMR 4064, Varget, IMR 4350, and H4350.
Most of the rounds are currently loaded to close to SAAMI COAL spec of 3.600″ but .375 H&H chamber throats are actually cut quite long, allowing for rounds to be loaded out to 3.750+” depending on the ogive of the bullet. Using a Hornady Lock N’ Load, some bullets were touching the lands at 3.787″-3.878″ and the Sierra 350 grain SMK was 4.000″. This will make for some interesting testing to see which bullets like a running start of 0.200″ and which perform better with less jump closer to 0.020″
Stay tuned for updates later this week….