GOEX should work okay. Marvin Gearhart was very particular what went into his muzzleloaders, which was part of the reason he bought the old plant when duPont closed it down.
GOEX is Gearhart-Owen EXplosives division. They build oilfield logging and perforating trucks, among other things. My Dad bought 4 trucks off them at one time or another, got to know Marvin Gearhart well enough to go to BBQs and shoots out on the ranch.
LOT of explosives used in the oil patch: perforating, seismic, casing cutting, backoffs, packer setting, plug setting, fluid level checking, you name it. If you need a Big Hammer or a Big Wrench and what you are working on is a couple of miles straight DOWN, you use explosives...... and they gotta be GOOD.