Im trying to find info, and the search function is not helping. It seems to me, that If I have my g20 slide and barrel ported, I will be loosing velocity as well. So if a 4.6" barrel is ported, say, 1" back from the muzzle. Then doesnt it effectivly offer the same velocity as a 3.6" barrel? Seeing that the the expanding gasses stop pushing the bullet at that point and start exiting the ports to comp for muzzle rise.
Now, If I want to maintain the muzzle velocity of the stock length barrel and reduce muzzle rise, I think I should opt for the extended/ported barrel. Is there a substantial reduction in muzzle rise? Im shooting 200gr hard cast, 1100fps loads, having a hard time getting a fast followup shot.
About a 30% reduction in muzzle rise can be expected. And a 25-50 fps drop in velocity. The reduction in muzzle rise will probably be improved a bit with a longer tube, and the velocity loss will be minimized.
Source:
https://gundigest.com/article/ported-barrel-reduce-recoil
Quote from: TacticalAnt on November 24 2018 05:53:07 PM MST
... So if a 4.6" barrel is ported, say, 1" back from the muzzle. Then doesn't it effectively offer the same velocity as a 3.6" barrel? Seeing that the expanding gasses stop pushing the bullet at that point and start exiting the ports to comp for muzzle rise.
...
The expanding gasses don't stop pushing against the bullet after they get to the ports. As long as there is gas coming out of the ports there is some pushing the bullet forward.
(https://www.the-armory.com/shopsite_sc/store/html/media/Glock/Glock_compensator.jpg)
Porting the barrel and slide is one solution, however adding a longer threaded barrel with a ported compensator and fine tuning with the weight of the recoil spring for the specific load may be a better option ... at least to get to where you want to be. Generally, a 22# RSA will help with full power 10mm loads.
https://www.youtube.com/watch?v=wFzXm-0sMrk
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