| deeangeo |
| (.300 member) |
| 30/06/15 04:01 PM |
Re: MSch M1903 rotary magazine feed problem!
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Quote:
As discussed in an earlier thread, I too had problems with Privi ammo jamming the NOSE of the bullet on the ramp. I modified a spare catridge stop to allow the cartridge to rise slightly higher. The bullet nose then contacted the ramp where the angle resulted in improved feeding. You cannot be gentle with the bolt but it does not jam. Just remove metal a little at a time and keep checking the function. I think if the cartridge is higher, it will not contact the sharp edge where you are having trouble
I have a 1952 M-S rifle that allows the rounds to feed much smoother than my 1903. I believe Steyr modified the feeding system after WW II.
Pretty much exactly the area of conclusion we came to yesterday. I had mentioned earlier in the thread the release tab was worth checking, but was distracted away by the contrasting differences in the side feed ramp.
I have checked together with my engineer the feed ramp yesterday and will continue examining today. Yes, we can make a 'polishing' change to the side feed ramp if necessary. But we conclude this should not be required as we believe the problem really lies with the underside of the cartridge release tab.
It is currently our view the underside of the tab is worn and so fails to hold the rear of the cartridge down enough, therefore not presenting the correct angle of approach of the cartridge case, to the side placed feed ramp, when the bolt is pushed forward.
It looks like max .005" perhaps not even so much can correct the problem...we'll look at how to add the metal in experiment today. Then determine if the problem may be resolved this way. We shall see!
Cheers, deeangeo