(I believe that both required the addition of a Sako extractor for proper ejection)
Factory XP 100 in .221 Fireball will work for a 20 VT. Same case head size/length and extracts/ejects like a dream. Modified (shortened) the ejector rod so it didn't throw the brass as far.
Did the XR 100 ever come in .221 Fireball?? That would work.
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