new upper problems

[markpurifoy]

Have loaded some rounds and have shot them. Started at 8.4,9.0,9.4,10.0,10.8. All loaded with 240 MKBT.having ejection problems.10.8 kicked the bolt back and bottle neck in chamber.HELP!!!!!!!!!!

[TCCrewchief76]

What powder? Which brass headstamp? How many times loaded? Need more info to help.

Kevin

[markpurifoy]

What powder? Which brass headstamp? How many times loaded? Need more info to help.

Kevin

h100 power,rem 223 new brass trimed to 1.355,240gn mkbt.first time loaded.

[Hoser]

Rifle length buttstock or carbine? What buffer?

It is all trial and error.

There is not one quick fix for it all.

[TCCrewchief76]

What's your process for making the brass? I found that sizing from 223 to 300 in one step really stresses and cracks the brass. The brass may need to be annealed to keep it from cracking, be it longitudinally or circumferentially. I use a form and trim die from CH4D for making mine. As there is no expander mandrel to neck up the brass with this die, I have to run it over a full length die to get the dimensions correct before loading. I use WIN once-fired brass (so far), and I don't find it necessary to anneal, yet.

Kevin

[BWE Firearms]

Were is your gas port drilled, pistol or carbine position?

[markpurifoy]

Unknown gas port. Waiting for model1 to call to answer that.

[markpurifoy]

I run in my redding die the cut off at shoulder then trim to length. I trim to 1.355.

[markpurifoy]

Carbine length stock.

[Spook]

Unknown gas port. Waiting for model1 to call to answer that.

Mark, open gas port to .120 or try AA1680 powder.

[alorton]

Unknown gas port. Waiting for model1 to call to answer that.

If it is Model 1 then the gas port is most likely in the carbine position. I've only heard of one guy getting an M1S barrel with the pistol position port and he had to ask for it.

With the port further out you will most likely need a slower powder and/or a larger port as Spook suggested.

[i8asquirrel]

Spook giving you good advice I went to 4227 and 1680 at his recomendation , opened gas port to .116" and I also lightened buffer to around 1100 grains and mu rifle functions every time, Sub loads or super sonic! Good luck.

[markpurifoy]

Mark, open gas port to .120 or try AA1680 powder.

ok how do i do that

[markpurifoy]

Spook giving you good advice I went to 4227 and 1680 at his recomendation , opened gas port to .116" and I also lightened buffer to around 1100 grains and mu rifle functions every time, Sub loads or super sonic! Good luck.

how did you open port up and lighten up the buffer.my lower is DPMS and use it 223 upper. so will doing anything to lower mess up shooting my other upper in 223.

[markpurifoy]

Mark, open gas port to .120 or try AA1680 powder.

how do i do this and what load do you use.

[Spook]

ok how do i do that

given the question you might ask someone to do it for you.:confused:

[i8asquirrel]

ti lighten the buffer : remove it from the lower and take the synthetic plug from the rear of the buffer, inside you will find weights and rubber spacers. take out the weights and set the buffer on your powder scale, add weights untl you get the total to +/- 1200 grains...I filled the void in the buffer with walnut shell so the weights didnt rattle. reassemble and give it a try....you should probably have a smith open the gas port. If you dont know how you can screw things nup pretty good..... good luck

[Hoser]

ok how do i do that

Contact a gunsmith.

[markpurifoy]

given the question you might ask someone to do it for you.:confused:

I have takn the front site off. The gas port is lgr. enough. I can put the tail end of a 1,8 drill bit in gas port. That is above you .116 and check what now. I going to get some 1680power and try this see what happens.

[markpurifoy]

ti lighten the buffer : remove it from the lower and take the synthetic plug from the rear of the buffer, inside you will find weights and rubber spacers. take out the weights and set the buffer on your powder scale, add weights untl you get the total to +/- 1200 grains...I filled the void in the buffer with walnut shell so the weights didnt rattle. reassemble and give it a try....you should probably have a smith open the gas port. If you dont know how you can screw things nup pretty good..... good luck

not that i didnt understand just dont want to do it wrong.Will check buffer weight.Thanks

[Shadow 300]

Have you gotten your rifle shooting reliably yet?