Pellet sizing with a T.R. Robb sizer…

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shootinsquid

shootinsquid

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Nov 16, 2024
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South Texas
This might be a thread showing off my n00bness, but so be it.

Ordered these from Mr. Robb in jolly ol’ England and finally got around to using it since I had time today. I noticed that my Diana 54 liked pellets at 5.48mm head size because bigger than that made for difficult seating in the chamber, so I sized some RWS wadcutters I was using down from 5.54.

Aside from match shooters, how many of y’all size pellets to each rifle as a normal part of plinking? Just like for centerfire, I try to remove as many variables as I can to ensure confident shot placement.

Or am I nuking backyard plinking far too much? 😉


IMG_1666.jpeg
 
shootinsquid said:
This might be a thread showing off my n00bness, but so be it.

Ordered these from Mr. Robb in jolly ol’ England and finally got around to using it since I had time today. I noticed that my Diana 54 liked pellets at 5.48mm head size because bigger than that made for difficult seating in the chamber, so I sized some RWS wadcutters I was using down from 5.54.

Aside from match shooters, how many of y’all size pellets to each rifle as a normal part of plinking? Just like for centerfire, I try to remove as many variables as I can to ensure confident shot placement.

Or am I nuking backyard plinking far too much? 😉


View attachment 566898
Click to expand...
It’s a hobby so whatever floats your boat 🚤
I have one in each caliber but have yet to use them…. Time!
 
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cavedweller said:
It’s a hobby so whatever floats your boat 🚤
I have one in each caliber but have yet to use them…. Time!
Click to expand...
Finally decided to try one of my pellet sizers. these are easier to use than the one pictured by the OP - note I have both. thi one is from the shooters box in usa. Nice tool as it fixed many deformed skirts an caught several too small pellets
IMG_0387.jpeg
 
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The TR Robbs are a tapered sizer. They preserve a larger skirt than head, although at a smaller ratio most pellets have as OEM. This is usually desirable for pellets.

@cavedweller, I have one in .25 like the one you show. It's a push-through, and will leave pellet head and skirt the same diameter. I use it for a go/no-go on my cast .25 slugs.
 
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I like the tapered sizing. Tried many depth and tested on paper varius distances.
Finally ended up fixing the depth at a position where the cone creates a minimum but clear ring all around on pellet head, and of course that gives a nice ring on skirt edges as well.
Inspecting with a high magnification jewellery lupe ;)
The resized head actually rides = and orients the pellet on the lands, the skirt closes the air gap on the grooves.
 
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