cayugad
If you're looking for a .503 bore... do you have a fast twist GMB?
Not sure if you were asking me - but yes, i have 3 of them GM-LRH barrels - do not know why I have 3 but at the time itseemed like a good idea...
What I need is a bore in between the White .504 aand this new MK which is also listed as a .504.... Actually the MK bore is almost perfect for these sabotless bullets. With the short start I can with a good rap push the bullet in all the way past the the fourth gas ring - then the ogive needs a tapping to get it started in - then just pushing with the ram rod slides the bullet down just like a snung sabot.