Fredj if your shooting 338 maybe your results will be better than mine. I've gotten HiTek to 1500 PB accurate, changed to PC above that (300BO). 308W @ 2600 with HiTek less GC was barely on paper, even with ~36BHN alloy. AC COWW with GC and HiTek didn't lead but accuracy was 4-5" @ 100. H.T.'d wasn't much better. IMHO, HiTek will take the 1600+ fps (with the right alloy & fit) but it's tumble lube so on BB I think the base isn't evenly coated for great accuracy. I suspect the same problem sans GC. Don't have a FB rifle mould so can't say.
I've just used red, black, green, gold & white and get interest in coating from others at the range. Played a 3 target timed @ 7 yd game with friend Wed, we tied. He used WWbox 165 in 40sw & I used 165 green HiTek, ACWW. We both shot the same pig, Thursday @ maybe 20 yds - he got front left leg and I got inch to the right of the tail. He ran another 100 yds on 3 legs before expiring. Only found one entry hole in the right ham, bleeding from the mouth. Both fired 5 rnds, my 3rd hit and 2 more @ ~50 yds. Running low on time so unfortunately I didn't recover the boolit. Yotes will have a good super.