I have recently had my Sako 75 .243 re barrelled with an Archer barrel, 600mm length, 1:10 twist, and pillar bedded into a Mcmillan stock. I have a P.E.S mod on the end. I shot the barrel in as per the Border Barrel instructions. I have only been re loading a short while and I'm struggling to find a load that suits.
This rifle is used only for deer, I often use it at decent ranges on parkland deer so am looking for a light and fast deer suitable bullet
I have been using 90g Nosler ballistic tips. So far I have tried Vit N150, Vit N160 and IMR 4831. I use Lapua brass and Federal 210M primers. Brass has been shot 3 times with full resizing between uses. I have seated the bullet 10 thou off the lands. The smallest group I have managed is just below the inch at 100. I have shot loads with mod on and with mod off. I know it is possibly a bit anal to be wanting tighter groups but after spending sh*t loads on the rifle... I do.
The first thing I doubted was my shooting so tonight while working thru a load with my 243 I had my 308 with me and shot a raggedy 5 shots one hole group with 150g Nosler ballistic tips in Lapua brass with Federal 210M primers and 44g of Vit N135.
Any suggestions on any aspect of the above would be greatly appreciated. Should I keep trying different powders with the Nosler 90g if so which ? Should I be trying a different bullet weight and type, if so any suggestions ? Seating depth ?