I have always gotten very good accuracy with Remington 180 grain 'factory ammo' in my Krags. Don't look at this ammo as just a 'donor' for Brass. It may become your favorite loading!

I have also gotten fine performance with reloads using 165 grain spitzers.

Lighter projectiles are a good way to keep pressures down and lessen recoil.

Cast bullets also open a whole world of accurate and lower cost shooting.

There are many options if your main objective is accurate ammo for 100 yard targets.

IMHO - 220 grain projectiles are for rather specialized shooting.  Other choices may better meet a lot of shooter's needs.