@Gibo that would be this one Rear bag. Landed at about 320 grams for Pro version.
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You can buy me one of those for my birthday next week Gibo. There's a good man.
@Gibo can you put one on your order for me too please
Here's what I use for F-Class shooting:
Protektor Bunny Ear Rear Shooting Rest Bag Heavy Bottom Leather Tan
As Gillie said, the cheap Caldwells end up with a very rounded base which rolls about.
These Protektors have super thick solid leather bases
PS
Order the --unfilled-- version to save weight
Rushy will pay for mine. Can call it even, ish. Ta.