RE: lightest load for 270wsm
Probably the cheapest lighter recoiling ammo for the .270WSM is the Remington Express 130 gr core-lokt loads. If you can find them. It is getting tough to find any inexpensive ammo for the .270WSM. Most shops only stock the premium bullet stuff with the premium prices. Handloading is the best option, since I can load up some nice Nosler 130 gr Ballistic Tips at about 3000 fps for about $5 for a box of 20. Using factory seconds (that shoot as good as factory firsts), Accurate Data 86 Powder (less than $10 per lb delivered) and fired cases. If I have to buy new brass, it would up the price to about $8 for a box of 20.