303 British and Barnes TSX

.303

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Kootenays BC
Does anyone use this combination? I have a 303 I use a Number 4 mark 1 Sporterized for Hunting and have some Barnes TSX 150gr on order.

I am trying to decide on the correct powder to use. I contacted Barnes and they informed me that they don't yet have any data for their .311" 150gr bullet. (In my mind I thought they'd have to test it first...but what do I know). They said use the Hodgon Data.

I will be using CCI Large Rifle 200 Primers and thought maybe IMR 4350 or 4895 would be decent.

Any info would be great thanks.
 
Found these for a great price from Jerry Teo at Mystic.

Btw, are these a flat base bullet?

Edit: NM, I see they are indeed flat base.
 
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