IF your going to go with a wildcat and if your looking at the 6.5-06 I would recommend you take a hard look at the 6.5-06 Ack Imp. This round has never failed to impress me with performance and accuracy for the size of the round. Loading is extremely easy as well.
The easiest thing to do is buy 25-06 brass. load a medium upper end load for the 6.5-06 in the standard 25-06 case which has had its case mouth deburred and simply seat a boat tailed 6.5mm bullet into the standard 25-06 case. IF you use a Ballistic Tip this works EXTREMELY well and you will not even be able to tell the case is 0.007" to small in diameter as the solid base boat tail will do the neck expanding for you as it is seated.
Simply shoot this round and out come sexy looking 6.5-06 AI cases. This is a substantial increase over the performance of the standard 6.5-06 and will at times give the 264 Win Mag a run for its money in barrels under 26".
This target was shot using the old 155 gr Sierra MK.
Every rifle I have chambered for the 6.5-06 AI has performed like this. IT is a very accurate round, cases last forever if you do not run your pressures to high as the sharp shoulder greatly limits case stretching.
Just another idea to look at. For the most out of the 6.5mm family or cartridges based on the '06 class of case capacity, the 6.5-06 AI is very hard to beat.
The 270 Win cases can easily be used to form this wildcat, just be sure to trim them to length as the 270 is longer in case length then this wildcat. Not a big chore though.