308 cal case 311 boolits .. why not use a 310 expander Ball is a RCBS die

so just wondering : on a 308 cal case with 311 boolits .. why not use a 310 expander Ball in a RCBS resizing die.. and a lee universal expander (to bell the mouth). Why do most here recommend a lyman M die. does the M die resize the inside and bell the mouth ?
edgemacate me

My "M" dies are 30 years old, and they all inside size the neck and flare the mouth. Try the .310 expander ball and see how well it works. It might do exactly what you want it to do ... it might not. If it doesn't, you can always start over with a full length sizing operation.

"Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime.", old Chinese proverb.

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Abbreviations used in Reloading
Pointed Soft Point "Core Lokt"

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