If you have a contender/G2 frame theres also the 6.5JDJ. If its an encore frame the calibers are endless...204 ruger, 22-250, 6mm rem, etc. Call JD Jones at SSK industries. I have spoken to him several times on the phone and he was very helpful with building custom chambered barrels for me.
Of those six MGM barrels, only one was made 100% correctly.
One needed the scope base modded just to get the scope on paper at 100 yards. Scope ran out of adjustment and was still 20+ inches off. MGM's fix was a 20 MOA base.
Second barrel was short chambered by 0.018".
Third barrel was cut shorter than requested and wrong scope base was supplied. MGM also failed to drill and tap for a 6 hole base. Barrel was returned.
Fourth barrel was a replacement for the above barrel. Scope base was correct but barrel was drilled and tappeEd offset to the right by a few degrees. Throat was also 0.060" longer than requested (dummy rds were sent in to set throat).
Fifth barrel was made on my blank. By this time I was really apprehensive about sending it in but I did... So far This barrel is the only barrel made 100% right.
I sent in the stub from the fifth barrel for MGM to make the sixth. After getting the fifth made absolutely right, I'd lost my apprehension. When I opened the package on the sixth, I was pretty hacked! First thing I noticed was the missing scope base and the scope base holes drilled and tapped grossly offset to the right, and crooked to boot! The throat on this one was so long I could drop a bullet into the barrel and then seat a case on top of it without the case touching the bullet. THIS on MY blank! I sent it back. MGM fixed the scope base by moving forward 0.100" and redrilling the holes. Unfortunately the throat couldn't be fixed. I gave this barrel away and informed the individual of the issues.
THAT is why I recommend SSK...
MGM will also use Green Mountain blanks unless you request otherwise. These blanks are not what I'd consider "top shelf" blanks.
I've done business with SSK and have never had an issue. Cost is more but it'll be done right.
SSK or Bullberry. If your frame has SSK Chrome on it, the choice is obvious. I have shot a lot of TCU cartridges and they will not do the job consistantly beyond 200yds. Not enough velocity. Accuracy will be there, terminal performance will not.