I find the NJ Phillips guns really great. I use them for dosing dairy cows, their offspring and other groups of cattle. Their frame is metal which I feel gives each gun great strength, and it allows the heavy spring to reload the gun fully each time, which is very important. The wearing parts such as the internal springs and seals are easily replaced by unscrewing each end which is very handy. I find it far more superior to the cheaper plastic guns on the market.
Setting the output of the gun is very simple and the lock nut means that while dosing my animals, the amount stays the same throughout the entire process, but if I want to give and animal a bit more or less, it's very easy to do so.
I would recommend the NJ Phillips range to anyone, and would be slow to purchase anything else.
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