Old school Barnes X - 75 grain 6mm

[Calvin45]

Hi all, got some old school Barnes X bullets for a good deal on auction…they are 75 grain 6mm bullets. Not tsx, not xlc, just "X". Seems like a great weight for a mono in .243, not sure why they only kept heavier iterations when they upgraded to tsx design (though I suspect it's just cuz the masses don't know any better and wouldn't use a 75 grain for deer regardless of construction)

Anyone have any experience with this particular bullet? Gonna be treating with HBN and loading in a .243

 

[memtb]

They were bad about fouling anything short of a near perfect bore! They also, because of the increased bearing surface (no grooves) were prone to high pressures! That said, they killed quite well. I still have a few from the old days….prior the the TSX's and TTSX's. Though, mine are a bit larger, heavier than your 75 grainers……about 200 grains heavier! memtb

 

[Calvin45]

They were bad about fouling anything short of a near perfect bore! They also, because of the increased bearing surface (no grooves) were prone to high pressures! That said, they killed quite well. I still have a few from the old days….prior the the TSX's and TTSX's. Though, mine are a bit larger, heavier than your 75 grainers……about 200 grains heavier! memtb

Yeah I've heard this side of things. The tsx was invented to solve a real problem.

That's where I'm hoping to change the game
With hex boron nitride treatment and perhaps the use of an enduron powder or some other copper fouling eraser type powder.

 

[Calvin45]

Load data - 75 grain Barnes X 243 Winchester

Hi all. WARNING - this is not pressure tested data. Additionally, DO NOT BE STUPID LIKE ME and move up in 1 grain increments in such a small case capacity. I had a brain fart and treated this 243 like the belted magnums I’ve been loading lately…bone head move. But I just thought I’d share...

www.longrangehunting.com

Did some very primitive load development and got some preliminary numbers