617 SPEED LOADERS
I've been using one Ansac 10 round loader and a 60 round loading block with good results. Blocks can be 40-60-100 rounds or you could diy to any amount desired. The downside is the block can be knocked over and ammo dumped. I'm not sure what game you're shooting or just informal target/plinking. If you have the coin, getting 5-6 loaders @ 50-60$/per, would be very fast & secure. The Ansac loader reminds me of the safariland type that will only drop the rounds into the cylinder/ nowhere else.