Discussion in 'Handguns: Autoloaders' started by unspellable, Mar 29, 2021.
BTY: the High Power seems to function fine with a 9 mm spring and guide rod.
A difference in the springs is expected as the 7.65 mm produces less recoil impulse than the 9 mm.
Would not expect the Ruger guide rods to look like the Browning guide rods and they don't. In the Browning the take down pin goes through an eye at the rear of the guide rod, not so on the Ruger.
Ruger P89 springs and guide rods. 7.65 mm on the left, the spring is captive. 9 mm on the right, spring is free. Note the wasp waist on the 9 mm rod about 1/4 of the way down.
High Power guide rods, 7.65 mm on the left, 9 mm center. The sproing is for 9 mm. The thin rod at front of the 7.65 is spring loaded and can be pushed into the main body. The 9mm rod has a spring loaded ball at the front. The pin on the take down lever passes throught the eye at the rear of the rods.
The 9 mm cartridge will produce about 13% more impulse than the 7.65 mm cartridge, not a huge difference. The High Power ran 20 rounds of 7.65 with the 9 mm rod and spring with out a hiccup.
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