Breechplug
It is a pistol bullet (40 cal) and you would need to get buy sabots separately. If you were going to try this combination - I would suggest a2 packages of Harverster blue 'crush rib' sabots. I use the MMP 40/50 cal blue sabot but I know that it will fit my guns, but a little tight so the Harvesters would be a little easier to load.100 grains of T7 gets me about 2100 fps with the 200 grain XTP's...