Neck sizing for different gun, same model?

[LynnJr]

Neck sizing will also reduce your extreme spreads but nobody ever mentions it.
My only comment on Mr Corrina comes from his tuner videos.
I wasn't aware he was such a tuner authority when I was using them 15+years ago and nobody had ever heard of him.

[vinconco]

you know Cortina is not a BR shooter right?

F Class is called "Belly Benchrest" because it's shot prone.

[mmlook]

F Class is called "Belly Benchrest" because it's shot prone.

except they are totally different

[JagerDog]

except they are totally different

Regarding neck-sizing, the difference is irrelevant. Ammunition consistency and extended case life benefit both similarly.

Some of the "extreme" measures by BR shooters probably won't put an F in the money.