Changing Pocket Uniformers On Lyman Prep Center

Hand decappers, chamfer/deburr tool, primer pocket tool.

Changing Pocket Uniformers On Lyman Prep Center

Postby Ranch Dog » 17 May 2018 06

After yesterdays run of brass across the Lyman Prep Center, I decided to ordered new RCBS Large Pistol and Small Uniformers to replace the Lyman toolheads. Some time ago I had bought the RCBS Large Rifle Uniformer as the Lyman tool is not specific as to which primer pocket it is made for. From measurement, it is for a Large Pistol pocket; hence, the need for the Large Rifle.

What I've noticed is that the Lyman Cutters have dulled where the RCBS Large Rifle is still is as sharp as the day I bought it and it has prepped more Large Rifle brass than the Lyman Large Pistol and Small has combined. The problem with the Lyman cutters is that they have a flat surface with no way for the trimmed brass to exit the head after it has been removed. I have found myself with a toothbrush in one hand cleaning the cutter between every case.

The RCBS tools have a slot cut on each side of the head for the debris to exit.

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If you have ever wondered what the dimensions of primer pockets are, here is the SAAMI drawings.

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Hey, the forum has been slow.
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Re: Changing Pocket Uniformers On Lyman Prep Center

Postby JohnnyEnfield » 17 May 2018 07

Great info as always. Thank you sir.
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Re: Changing Pocket Uniformers On Lyman Prep Center

Postby Ranch Dog » 17 May 2018 14

JohnnyEnfield wrote:Great info as always. Thank you sir.

You're welcome!
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Re: Changing Pocket Uniformers On Lyman Prep Center

Postby GasGuzzler » 17 May 2018 21

An obvious thanks.
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