Roundlawlyn - I would say that they are about the same size as my saddlebacks, as growers, as adult sows, the saddlebacks are probably a bit taller, as they are more 'rangy', but the pie-train crosses have far better conformation (butts like J-lo, shoulders like frank bruno), and so weight more at the same size (if that makes sense).
I would say that the biggest benefit of crossing these two breeds is that you get the best of both worlds. They seem to have the flavour, the hardiness and easy temperament of the saddleback but have the conformation and growth rates of the pie-train. The biggest thing the pie-train ads though, is that conformation! The hams, shoulders etc are far far fuller, and more rounded, and the chops are huge.
I have a litter here now, that are five months old, bearing in mind they have not been pushed, and have been free ranging in the winter months, they are at the 55-65 kilo live weight stage now, some are probably 70 kilo. I will send them at around 80 kilos. If I push them, they could reach similar weights much quicker. These guys, since weaning have been on 4lb of feed each per day, if they were fed ab-lib they would be killable by the 4 month mark.
They are good for both pork and bacon, and do not seem to run to fat anywhere near as easily as the pure traditional breeds can at times, but it can be added if desired.
The best i've ever got for weaners is £50 for birth notified saddlebacks, so taking £45 for these, i'm happy.
Basically it's the same model as I operate with the sheep, a terminal sire over a good maternal animal, in order to produce a good marketable offspring.
Harmony - Now i'm not going to start an argument, but do you actually have any evidence to support what you have said? Or is it just the usual small holder hubris? I hear it a lot that the traditional breeds taste far far better than any x-breeds. . . . but usually folk have never actually done the taste test. They are merely putting their experience of the bland, mass produced supermarket crap, against what they have produced at home. I would suggest that there are far far more factors affecting the taste of pork, than merely its breeding, the way its reared and fed, probably being most important. Also these particular cross breeds, are half saddleback anyway.
We did some taste tests, and basically most folk have not noticed any difference, and if they do, it's more likely to be the size of the chop they notice (in a good way!). They have all without fail, said that the cross breeds tasted 'fantastic'. For the record we also keep traditional / pure breeds.
I do understand the idea of supporting traditional and rare breeds, but i'd hardly say that the saddleback, osb etc are endangered! They are under going a massive revival with all of the 'good lifers'.