Re: 257 STW in a Ruger 77?
Another Montana boy, welcome to LRH!!!
I have converted a few Ruger M77 MkIIs to the full length magnums and the converions do work very well for a big game rifle.
It should be clearly understood that this is only possible with a Ruger M77 MkII receiver, it is NOT possible with the old standard Myy with the tang safety.
There is some extensive machining required to open the Ruger receiver up to accept a magnum length mag box. THis milling is fine as long as you do the cutting at the rear of the mag box and not at the front where the bolt lugs are supported by the receiver.
The case ejector also has to be modified to accept the longer bolt throw.
If you start with a magnum bolt faced Ruger M77 MkII they generally feed like a dream, in fact the ones I have converted you would never know that they were not shipped like this as they fed so well and smoothly.
So yes if you have a MkII this conversion is possible.
The 257 STW is a great round as well. If you use a +26" barrel you will get some serious performance. Before I designed my 257 Allen Mag I used and tested the 257 STW extensively and was impressed with its performance but I personally wanted more velocity with the heavier bullet weights so I designed my 257 Allen Mag.
I have build many 257 STW rifles for customers and have yet to hear anyone complain about performance or accuracy. It is a very serious deer round in every way.
Allen Precision Shooting
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