Had a box of old .270 Norma 150 grn ammunition, it's probably 20 years old, left that I picked up cheap ( got two boxes back then) when the Lewis Gun Room closed up. Tried it in several rifles and accuracy was usable but not stellar with groups hovering just under 2" so it got put aside and had 12 rounds left in this one box.
The other day I needed whilst sorting out the cabinet I spotted it again and started thinking about it. So as I was doing a spot of reloading I took the box out with me and pulled the bullets forwards in the case slightly uing the Kinetic hammer then re-seated them to about the same depth as original. This was easy to see as the 150 Grn Norma bullet has a cannulure.
Well what do you know the following day the Karl Kaps 6x42 scope showed up on the doorstep in the post so it was duely mounted on the BSA Majestic that arrived a few of months back and as I needed some ammuinition to try out the scope I took the Norma as it would give a chance to see if breaking the old seal and re-seating the bullet had any noticable diffference. Shooting was done prone using a Bi-Pod at 65 paces, a nice dry slightly raised spot to lay on decided the distance , the scope was adjusted to the reading taken with the old scope using the colimeter.
The first two shots were touching but 0.9" to the right and 0.3" low. Adjustment to the left was made and #3 fired. Hmmm too far by 1/4" elevation was adjusted next and #4 fired. This landed about 1" high and to the same windage as #3 so another 2 shots were fired with no changes to adjustemnts and the three shots make a group of 1/2" x1/4". I think that will do quite nicely.
Now the question is did just re-seating the bullets make such a difference? or does this rifle just like the Norma?..................... To find out I will have to fire three of the remaining rounds through a rifle that disliked it before and see how the groups now.
Meanwhile I tweaked the windage adjustment 2 clicks right which in theory should put it about spot on for windage but of course will ahve to shoot to check this .