You have other choices than reduced loads.
1. Add a good recoil pad, the Limbsaver small grind-to-fit doesn't take much fitting and is so much better than the factory pad, there's no comparison. I have one on all my heavy kickers, to include my .45-70 Handi shooting 300gr Nosler partitions at over 2400fps which is considerably more stout than whelen loads. Also have one on my .338-06 Ultra shooting 250gr SGKs at about 2500fps and .405 Winchester Target, it's the only way to go!! :wink:
2. Add a little lead in the stock bolt hole for bench work, you can pour it full of lead shot, or do as I did, fill a pipe full of lead and slide it in when you need it, take it out for hunting. The hole is 7/8" diameter, a ¾" or 7/8" pipe will add about 2lbs of weight to the stock.
3. Spend $40 on a mercury recoil reducer.
http://www.mpcsports.com/index.asp?PageAction=VIEWCATS&Category=245Tim