Reloading 6.5-303 British
My Ross MKIII was so worn, the bullets where coming out sideways. So I got very similar mod to mine made at the same place. Same action, same barrel same caliber. Not built for pretty. Kept the factory stock.
I didn't see a whole lot of info on actually shooting it and couldn't find much info online with 6.5-303 Brit reloading. So here's my experience so far.
I use the factory sights.
I got a RCBS 6.5x55 die set. I resized the 303 brit casings just deep enough to just touch the shoulder then I annealed them. They fit in the chamber so that's good enough for me to fire-form them.
I didn't work on a specific load. I just wanted something safe to shoot and fire-form my casings. I used 35gr of IMR-4895, Bullets are Nosler P/N 26725 140gr, sitting at 3.100 COAL so they fit in the Mag. The powder load was weighed only once. It was just a rough load plus or minus 1/2 grain either way to save time.
I used a 303 Brit shell holder with the 6.5x55 bullet seater die.
I fired a few sighting shots at 50m to get in the ball park. then backed up to a 100 meters.
This gun is definitely a long range riffle. With a proper load, I can see myself easily do sub MOA with factory sights no problem. (I sighted with the peep sight for accuracy)
After being shot, I annealed and I sized the casings using the 6.5x55 die. I brought the shoulder .003" back. I trimmed the casings to the 303 British specs. (max 2.222), tumbled them and now they wait until I have a bit more time.
Now that I have enough casings that are fire formed to the chamber. My plan is to work up a load using H-4350 powder, Im thinking a starting poing of 39gr and work up from there until I'm happy. Same bullets and seating.
https://share.icloud.com/photos/0WumBV94Inyy_iuBuQNiamgBg