Well some corrections after looking at the gun it is a Remington Gamemaster 760 that was chambered in REM 35. Somebody had it re-chambered to .358 WIN.

I took it up saturday and played with it and found a really good load. 48.0 grns of IMR 4064 CCI 250 mag primer and a Hornady 200 grn. SP. At 100 yrds. it holds a 1" group and the average chrony reading was 2520 fps. that is close to 30-06.

This is a compressed load I have never done any compressed loads before either but it worked great. I had a great time learning something new talked to a gun smith and did a lot of research. I must also say after looking at the ballistics of a 35 REM I can see why they had it re-chambered.