Shell holder question

Maelstrom

Sergeant
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Minuteman
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Jan 6, 2007
1,299
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Southern Maryland
I am sure this is a stupid question but please humor me. I know enough to be dangerous but not enough to be smart when it comes to reloading. My friend is helping/supervising me but he was not 100% sure about my question. I have a RCBS Rock Chucker Press and just purchased new Redding dies to start loading .308. The Redding dies box says I should use a #1 shell holder. I use an RCBS #3 shell holder when loading my .22-250 using RCBS dies. I was under the impression both case use the same size shell holder. Does it really matter what brand shell holder I use as long the manufacturer says that it is the right size for my cartridge? If I need to buy a Redding shell holder to use with my Redding dies I will but I was thinking I could just keep using my current RCBS shell holder.