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Shoulder set back 308
Posted: Sun Dec 25, 2011 1:17 pm
by EagerNoSkill
To fl resize a case what is the goal 0.0010 inches from SAMMI spec
Taught in metric trying to reload in imperial :cool2:

:shock:
Re: Shoulder set back 308
Posted: Sun Dec 25, 2011 1:27 pm
by 20series
After FL sizing 308 cases, i trim them to 2.008" which is 51.0032 mm
hth
Alan
Re: Shoulder set back 308
Posted: Sun Dec 25, 2011 1:45 pm
by ovenpaa
But you mean how far back should you be bumping the shoulder ENS? Do you have a bump gauge to measure or are you using a thimble type micrometer tool? .001" to .002" should be fine however it does to a degree depend on how often you check and then bump it back.
Re: Shoulder set back 308
Posted: Sun Dec 25, 2011 1:59 pm
by spud
if you do mean the shoulders as dave says .002 - .004 but defintly no more than .006 as you can run in to the dangerous area of case head sepperation as dave says get yourself a shoulder gauge
Re: Shoulder set back 308
Posted: Sun Dec 25, 2011 2:06 pm
by EagerNoSkill
Hi guys
Thanks meant shoulder bump
Got the Wilson gauge and the hornady shoulder measure gauge
Thanks
Will do so
Re: Shoulder set back 308
Posted: Sun Dec 25, 2011 2:09 pm
by spud
Are you getting a tight bolt when you try and chamber a round?
Re: Shoulder set back 308
Posted: Sun Dec 25, 2011 2:13 pm
by EagerNoSkill
Hi spud
Nope. Still waiting for FAC so no gun in my hand at moment only brass prep
Have once fired HPS case from firing my gun at euro using them as benchmark accepting that some springbuck of the brass may occur
I thus use them as a chamber benchmark
I now have new lapua brass I need to resize prior to neck turn
I want to do the minimal resize prior to trim and turning them
Re: Shoulder set back 308
Posted: Sun Dec 25, 2011 2:17 pm
by spud
if its brand new virgin lapua brass simply run it through a full length sizing die then partial neck turn then after the first firing complete the neck turning to disired neck wall thickness and also trim to length after you have resized them in a fl die but before firing
Re: Shoulder set back 308
Posted: Sun Dec 25, 2011 2:27 pm
by EagerNoSkill
Ok cool thanks will do so
Got the redding FL sizing die to get it to the neck shoulder joint
The bushing die dies not full get there for the neck turning
Seating and neck sizing will be on arbor press with wilson dies
Re: Shoulder set back 308
Posted: Sun Dec 25, 2011 2:37 pm
by ovenpaa
If you neck turn you will probably have to change the neck bushing to suit or you will not get enough neck tension. Also it is probably best not to primer pocket uniform until once fired.