308 buffer help

[Jimboslice]

Hello I need help.... I have A DPMS 308

20" barrel , 7.25" buffer to and a 34 coil Spring my question is what weight should I be running on the buffer weight. Currently have a 3.33 Ounce  Add of the weight itself is 2.5" long ... My problem is when Shooting the BCG is slamming into the round as it's attempting to chamber After firing previous round it is Ejecting the Spent brass at about the 3 o'clock position... With no stove pipes or double feed issues.... Any help would be greatly appreciated

[98Z5V]

40 minutes ago, Jimboslice said:

Hello I need help.... I have A DPMS 308

20" barrel , 7.25" buffer to and a 34 coil Spring my question is what weight should I be running on the buffer weight. Currently have a 3.33 Ounce  Add of the weight itself is 2.5" long ... My problem is when Shooting the BCG is slamming into the round as it's attempting to chamber After firing previous round it is Ejecting the Spent brass at about the 3 o'clock position... With no stove pipes or double feed issues.... Any help would be greatly appreciated

You talking external dimensions by chance?  I'm betting that it's 7.000" internal depth of that receiver extension.

You need a 5.4oz buffer to run it properly.  Closest you easily get is 5.3oz, and that will work.

https://www.kakindustry.com/lr308-carbine-buffer-heavy

You need a Sprinco Orange spring, as a buffer spring.

https://www.primaryarms.com/sprinco-ar10-orange-extra-power-carbine-buffer-spring