Use a piece of PVC with a cap on each end then and fill it with sand to the desired weight. 550 cord tied around each end to mimic sling swivel studs and attach a sling. Perfect as a training tool to prevent being stopped multiple times while getting in shape for a safari. I'll take a picture of the one my wife uses and send you a PM.
As for a sling, we prefer the Dick Murray A-1. The beauty lies in the elegant simplicity of it's quiet adjustability without any unnecessary frills. Simple, effective and beautiful at the same time. We opted for Talon black stainless QR sling swivels and Dick was kind enough to put them on for us.
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Another sling I'd endorse the Trader Keith Rifle Strap (woven) with two silicone rows to keep it from slipping off your shoulder. I do believe that this is a beautiful sling that embodies an African hunt from days gone by.
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