Doing some testing on my Benjamin Trail NP2, we know bore cleaning and polishing can have a positive effect on air rifle accuracy, let's do some testing to see if there's any significant effect on velocity!
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Air rifles: https://amzn.to/3OSEqwT
Cleaning supplies: https://amzn.to/3Oqkkth
Rifle cleaning kits: https://amzn.to/4bqSWoS
Crossman pellets: https://amzn.to/3uoENrN
H&N Pellets: https://amzn.to/3OuqWXV
Chronographs: https://amzn.to/3HQYTxO
JB Bore compound and polish: https://amzn.to/3SM1lvO