So I have a Gewehr 1888 which has the S marking indicating it is Spitzer proofed. I have been shooting 198gr spitzer boat tails through it with good accuracy and no signs of doing any harm to the rifle. I however do want to shoot cast loads through it. I got a 200gr .323 mould that I was hoping would come close to the 88 patrone round that I believe the sights are still designed for.
When I cast the bullets and gas checked and power coated them they came out looking like this which seemed fine until I measured the bullet seating depth and found that unless I seated the bullet like this they would not chamber.
I chronographed the ammunition with varying loads and it came out extremely consistent in the 1960 fps range with 35gr of Vihtavuori N140 but when I actually tried to shoot it was minute of small moon levels of accuracy. I am assuming that the problem is the mold and seating depth so if anyone has a mold they'd recommend I'm very open to that. If that isn't the likely problem at all let me know as I may be way off in my assessment.