Roger46982
I shoot a 320, have for 4-5 years now. Everything I dhoot in it I have been shooting @ 100 grains t7. It will shoot just about anything you want to shoot sabot/projectile wise. I hope it shoots as well as mine has. It is an extruded barrel so the may be places in the barrel that the sabot slides down easier than others - but it has zero effect on perfromance for me.
Is your a new(er) one from Provo, UT or an older one from Weston, MO.
The two that I have are from Weston.
Iwas out last weekend with it and put the information here. But you will notice I did switch to 110 grains for this shoot.
The accuracy of this gun has been really good with all the combinations of bullets I have shot from it. I normally hunt elk with a .458 300 grain Nosler Partition and deer with a 260 grain Nosler. But recently I have been shooting a lot of Speer Gold Dots and I am pretty sure I am going to use them on deer. We can not use the 200 grain projectile in Idaho from a ML but that really might be an interesting bullet if you can use it.
Ignition with a 209 is much more reliable than ignition from a #11, not sure what might be legal for you. An you might want to fashion yourself a weather shroud (the bakealite shroud they give you will not last long before it is burnt up up) it can blow back a lot of material, up and out under your scope if you are using a scope. If you are using a #11 and no scope it really is not a problem.
Here is a thread....
http://www.huntingnet.com/forum/tm.aspx?m=1432426