It is most unlikely he will have any feeding problems.
Headache
For starters the H&H mag box does not have the tapered top part that the -06 based rounds mag box do. I have the parts on hand and have tried it.
Model 70 classics LA feed rails are all set up for magnum based rounds and use a mag box with tapered sides to get -06 based rounds to feed well. This works so so and many wont feed the last round.
Also keep in mind that if you use the follower for a -06 based box in an H&H length box it wont work worth a damn because of the followers length. Been there done that. That means you will have to use a H&H based follower which may or may not work.
IN regards to the wyatts boxs for model 70's. They are an abortion. Ask Redneck as he attemtped to straighten one out on a 300 win mag for me that another smith installed. Never could fix the thing and I ended up going back to a H&H box and 7mm stw follower.
