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Posted: 1/29/2017 10:04:17 PM EDT
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Well finally got to shoot my 300 blackout after changing the recoil spring to nemo 300 blackout spring. When shooting with a standard carbine spring the bolt travels too fast to cleanly pickup the next round in the magazine. The new spring solved it.
Now I am working on my Grendel and it is cycling too fast to grab the next round. Carbine gas system with standard buffer. I tried a h2 buffer and no luck. Will a lighter spring work or an even heavier buffer? Shooting as a single shot, I managed to sight in the scope. Now to solve the cycling problem. Grendel ammo used is made by hornaday. It does fully cycle the bolt. |
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Take a look at a spent case rim, and it will tell the tail if the bolt is unlocking too fast.
If the rim is all bend to hell, then the bolt needs to be slowed down on the unlock. If the side of the spent case is all scrapped to hell and a bend rim, then you have a chamber problem (could just need to be scrubbed clean) or very reamer chattered instead. As for the mags not keeping up, then have you pulled the mags apart to give them a good CLP cleaning, and are they USGI mags or some knock off clone mags that will cause nothing but problems isntead. Also, if you are using 223 mags, then they may need to be modified for the other rounds. Hence on some of the older magpul mags, the bullet is too wide for the inner slot, and the slot has to be narrowed instead so it can run with the wider bullets. |
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