Questions for 375 handloaders
I would prefer to end up with 1 load for the caliber (i know... i know) and use it on everything up to cape buffalo, hippo, and croc.
For Africa travel, I'll run a 300WM and 375 on a blaser so no issue with plains game overkill issues.
I like the RCBS matchmaster die sets with the adjustable seaters but it doesn't seem to be available for the caliber and if they were, I'm not sure it would fit in my old rockchucker. Any suggestions on dies and presses?
I typically buy a few boxes of a cartridge if it comes in the bullet I like and then re-use the fireformed brass with the same bullet. I don't see a lot of availability for the Barnes TSX 300gr which seems to be well regarded. If I start with virgin brass, what brands are recommended? I run Lapua on other calibers but don't see that for 375.
If I don't over-size the brass, how many reloads can i expect?
Any issues running hardcast 300 grains in a blaser for recreational pig patrol duties?
Some answers to a few of your questions:
Yes, 300gr Barnes TTSX or TSX is a great bullet. The 270gr barnes is a volumetrically large bullet since its 22% lighter than lead, so that is a good choice as well that tends to regulate well in many guns.
Regardless of die choice, make sure to drop the $15 for a Lee crimping die for your 375HH. You'll save the $15 in no time at all by avoiding stuck bullets and improper seatings with your dies by doing the crimp on a dedicated die after seating.
Lapua, Petersen, Remington, Winchester, and Norma are all fine brass. Professional loaders are singing the praises recently of Petersen for less cost and longer life than Lapua.
Brass life is based primarily on how hot your loads are. RL 15 powder typically provides best accuracy in 375HH at a moderate load which extends your brass life quite a bit.
Bonus answer: Reloader 15 is your friend on this mission.