QBZ-191 service rifle family


ChongqingHotPot92

Junior Member
Registered Member
SS109 62grain, 5.7mm gives 1.9g/mm2
DBP10 71grain, 6mm gives 1.97g/mm2

Then we have case capacity to area
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Where 5.8 had 2.11 and 5.56 1.87, this means that 5.8 have more powder. The pressure is peak pressure so probably the 5.8 uses a slower powder that have higher pressure after the peak. The force accelerating the bullet is the area under the curve times bullet area.

View attachment 78090
Oh Thanks. So Slower burning powder means that the DBP10/95/87 would need longer barrels compared to the SS109 in order to maximize lethality. I wonder if the new DBP191 would have similar fast-burning powder like the M855A1 (upgraded US SS109 with a steel tip), especially since the QBZ-191 has the same barrel length as the M4 and short-barreled HK416. Otherwise, it would be like firing the old SS109 or M193 from the M4, of which US troops complained about the lack of lethality during the beginning of the Iraq War.
 

by78

Lieutenant General
A few more DMR close-ups from Zhuhai.

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Aniah

Junior Member
Registered Member
Alright, now to ask the age-old question once again but does anyone have the barrel length for the DMR?
 

Aniah

Junior Member
Registered Member
A few more DMR close-ups from Zhuhai.

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51579544645_cd60524df9_h.jpg
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I forgot to ask earlier but all those 191s have their bolt taken out correct? If I remember, someone said someone got hurt messing with the bolt so they took it out. I don't know much about bolts but it does look empty. Correct me if i'm wrong.
 

MwRYum

Major
I forgot to ask earlier but all those 191s have their bolt taken out correct? If I remember, someone said someone got hurt messing with the bolt so they took it out. I don't know much about bolts but it does look empty. Correct me if i'm wrong.
Looking back several pages for comparison, seems that the bolt is still in. Probably the lighting wasn't that good.
 

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