Forster Dies Explained

[eric32]

No worries, but yes i have recently gone thru this with some once fired lake city LR 08 brass. In my 308win rifle.

Measured above the extractor groove.

Once fired case head was .473 this was previously fired in a SCAR 17

FL sized .471 provided some sticky extraction with mild loads of 308win. But longer strings of more that 5 rounds would start to get stickier.

SB sized .470 easy extraction on the bolt no problems single finger bolt lift everytime.

So i am working on a experiment now. I am going to SB die size a single case and track it until either the primer pocket goes or i see case head separation at the base.

 

[SheepDog]

If you end up with case head separation I would suggest having a custom die made to a few fired cases. You can request a small base with less shoulder set back to give you the smaller base with less shoulder movement to prevent the head separation.
At first glance this seems to be a load that is over what your chamber likes. Have you taken into count the smaller inside dimensions of the Lake City brass? They take from 2 to 5 grains less than most commercial brass.

 

[fredhorace77]

If your going to shoot a AR type gun you better use a small base die . Larry

i dont know who told u this lie, ive been shooting an AR for years and have never used a SB die, let alone even own one.

 

[savagedasher]

i dont know who told u this lie, ive been shooting an AR for years and have never used a SB die, let alone even own one.

I don't know it's a lie but I can tell you all the 3 gun shooters use them . They use range brass
Happy New Year Larry

 

[eric32]

If you end up with case head separation I would suggest having a custom die made to a few fired cases. You can request a small base with less shoulder set back to give you the smaller base with less shoulder movement to prevent the head separation.
At first glance this seems to be a load that is over what your chamber likes. Have you taken into count the smaller inside dimensions of the Lake City brass? They take from 2 to 5 grains less than most commercial brass.

Shoulder set back is still controlled by the USER with a small base die.

The load data is below pressure limits with not a single sign of pressure. Also quickload was used as a back up.

From what i have measured h20 capacity wise its not far behind lapua brass. But is does vary year to year.

Extraction has more to do with the case head clearance after firing if you are using a acceptable load. The .200 webline has to be squeezed down to have enough room to expand then contract in order not to stick.

 

[JRS]

Shoulder set back is still controlled by the USER with a small base die.

The load data is below pressure limits with not a single sign of pressure. Also quickload was used as a back up.

From what i have measured h20 capacity wise its not far behind lapua brass. But is does vary year to year.

Extraction has more to do with the case head clearance after firing if you are using a acceptable load. The .200 webline has to be squeezed down to have enough room to expand then contract in order not to stick.

Lake City brass usually has greater capacity than other brands and is made "Ford tough"

 

[eric32]

My fireformed LC LR 08 is measuring 55gr of water