I have a 1903 that I will be working up loads for in the near future. I prefer to have a bullet that has tension the full length of the neck. I am not saying any of these bullets are the most accurate or which is the best performer on game only that where they are seated they fill the neck, feed, and chamber smoothly. Several bullets I tried had to be seated out farther than I would like including the 139gr SPBT by PPU.
From top to Bottom
Hornady 160gr RN
Lapua 155gr Mega
Nosler 140gr Partition
Hornady 120gr GMX
The bottom bullet is a Sierra 160gr SMP Pro-Hunter which work just fine but no longer available.
My rifle seems to be a little more finicky than some. My rifle doesn't like the 160gr Hornady if I seat it to the cannelure. Just my preliminary experiences with this cartridge.
