Daniel-
I also have an english sporter chambered in this round.
It's a great cartridge, and has quite a place in the 'good old days' of the Africa Ivory trade.
WDM Bell used it successfully on elephant for quite some time before he switched to the 7mm.
Google WDM Bell and 6.5mm and see what you come up with!
You'll find some very interesting stories, and likely some leads on load data.
Like the others here on the thread I'll have to dig for my load data.
I have yet to finish my load development for my particular rifle.
I form brass from WW 303Brit brass
Your rifle was likely set up to run the 160gr bullet, I use the Hornady 160gr round nose which is very similar to the sporting bullet design from the period.
Will you please tell us more about your rifle?
Who made it, is it a Jeffery?
Can you post photos?
--Tinker
