Trailboss loads are intended for reduced velocity practice loads, without compression. They are not intended to replicate regulation MVs. BTW I suspect you'd have a tough time stuffing enough TB in most common NE cases to reach regulation MVs.
Right. You will be way over pressure by the time you get the velocity you want. And you can get enough TB in to cause pressure issues. 5744 works for light plinker loads. But that's no fun!
(Side Note)
My NEW Searcy 450NE will be here tomarrow
according to 'Big Brown'.. Thursday it'll be barking!