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Product Info for RCBS X-Die Small Base Sizer Die

RCBS has been the leading producer of high-quality gun reloading supplies, hand loading equipment, and precision shooting products for over 60 years. Our selection of Gunsmithing and Reloading Equipment from R.C.B.S. is second to none, and covers virtually every type of gun reloader supplies and tools that a handloader could want. Scales, primer, trays, cleaning brushes, lubricant, priming tools, dies and shell holders, bullet pullers - RCBS Reloading Equipment covers everything the veteran shooter needs to quickly, safely and cleanly reload a round of ammunition. RCBS Gun Reloading Supplies are great for handloading enthusiasts, as well as high-volume shooters, professional gun instructors, gunsmiths, and anyone else who takes their weapons seriously.image

Trim a bottleneck case once - and never trim again with the X Die Small Base Sizer. Its specially designed mandrel has an expander ball and decapping pin attached. The patented design eliminates the need for repeated trimming after an initial trim of .020 inch off the maximum length to standardize the case. The X Die doesn't shorten the length of the case: The mandrel reduces the growth caused by the case mouth contacting the mandrel during sizing. Because of an extremely close tolerance between the mandrel and die neck wall, the neck wall of the case does not thicken as the case length is pushed back. Cases repeatedly sized in the X-Die will initially grow a few thousandths of an inch, and then stabilize below the maximum case length with no discernable loss of accuracy or case life. Note: Those who are just starting to reload a given caliber should order the X Die Small Base Set containing the X Die Small Base Sizer and Standard Seater Die.

Specifications for RCBS X-Die Small Base Sizer Die:

Manufacturer: RCBS
Size: Extra Small
Quantity: 1
Color: Silver
Fabric/Material: Steel
Gun Type: Rifle
Country of Origin: USA

Features of RCBS X-Die Small Base Sizer Die

  • Trim a bottleneck case one time without shortening the length of the case, so no need to ever trim again
  • Specially designed mandrel has an expander ball and decapping pin attached
  • Patented design eliminates the need for repeated trimming after an initial trim of .020 inch off the maximum length to standardize the case

Package Contents:

  • RCBS X-Die Small Base Sizer Die

RCBS X-Die Small Base Sizer Die Orderable Models

List of Orderable Models

  • RCBS X-Small Base Sizer, .30-06 Spgfld, 39159 , MPN: 39159 , UPC: 076683391599 , Code: 3R-R6-38859-39159
  • RCBS X-Small Base Sizer, .308 Win, 39259 , MPN: 39259 , UPC: 076683392596 , Code: 3R-R6-38859-39259
  • RCBS X-Small Base Sizer, .223 Rem, 38859 , MPN: 38859 , UPC: 076683388599 , Code: 3R-R6-38859-38859
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Last updated 2026-08-07 UTC.