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, April 29, 2018 at 02:34:09 PM EDT
How do I determine which diameter is optimal for my Beeman's R1 .177 Air Rifle?
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, April 30, 2018 at 02:41:02 PM EDT
Thank you for your question. Every barrel is different. The only way to know which diameter is best is to test. 4.50 is a good starting point but it's a good idea to shoot the 4.49 and 4.51 to see if there is any improvement.
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