Before you do anything, make either a Cerrosafe cast or an impact impression of the throat. Measure it. If it's any bigger than .3095, the bullets you have aren't going to be very satisfactory. Now see if the bore riding section of the bullets fits the bore. You want a snug thumb press with light engraving on the tops of the lands. If they fall in, you're going to be less than satisfied. Also look at the lube on the bullets - the hard crayon type is worse than worthless. Something like 50/50 Alox/beeswax is the standard, and there are many other good ones. If everything fits properly, then as mentioned above just follow he reloading manuals for something near the start loads. Lean toward the faster rifle powders and ones known to work over a wide pressure range, such as 3031 and 4895. Personally I have great luck with AA5744 and IMR4759 in the 308, if you have any of those. Stay away from ball powders that don't burn well at low pressures, they'll make life hard on you trying to find a good load. Have fun, and with patience you should have good luck finding your 150 yd. deer load. (though you'll want to learn how to anneal the noses of your cast bullets so they expand for clean kills.)
