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Test Results


580-series with newer tapered 5/8" barrel

WITHOUT ACCU-STRUT

Average group size: 2.4" (std dev 0.48)

Comments: New barrel does show an improvement over the older skinnier barrel.

 

 

WITH ACCU-STRUT

Average group size: 1.6" (std dev 0.45)

Comments: The Accu-strut has reduced group size by about 33%. Less dramatic change than with the old barrel, but still significant improvement. 

This is about the maximum improvement generally seen, in some cases change is much less. We're hearing of results anywhere in the range of 0-33% with the new thicker barrel.

 

NOTE: While the Accu-strut will improve the performance of most Minis with the stock factory barrel, realize that the above results pertain to a particular rifle and your own results will vary. Factors which affect accuracy include modifications, nature of sight system, ammunition selection, frequency and thoroughness of cleaning methods, and shooter skill.