174 grain SMK back in stock....for now.

[browningautorifle]

Mk.8z is MG ammo

Agreed, can't say what their reasoning was. They sure made lots of it and the PCMR Rangers shot it for decades.

[Brian Dick]

It’s just a fact. I’m glad your rifles have good barrels with throat erosion that’s well in spec. When you get one that’s worn in well from cordite, you’ll surely see the difference.

[CINDERS]

My reloads of smk's work well in all 4 of my 303 shooters so I am pretty happy with them, here they are almost impossible to acquire now.
I've also developed loads and won comp's with the Hornady 150Gn SPFB .312" they fly pretty good up to @400m which is the furthest I've shot them.
Here is a pic of the 150 grainer how I seat them to just the bottom of the cannular and medium crimp them they fit in the mag ok and cycle well at least in my rifles, though I have polished up their feed ramps!

[Sapper740]

.....here they are almost impossible to acquire now.

That's a common refrain throughout Commonwealth countries. I keep in touch with friends and family in Canada who have the same tale of woe about the dearth of reloading components. Even during the Plandemic I was able to keep feeding my Ross, P14, and my various Lee Enfields here in the U.S.