I’m running a Wilson FL bushing sizing die, and a Wilson micrometer seating die. The Wilson sizing die doesn’t size the .200 base line below .4715, which seems to be what the Wilson seater expects. I’m baffled by this.
6mm BR Case Sticking in Wilson Seater Die
- Thread starter foxguy
- Start date
Should be closer to .469 ish, call Wilson tech dept. They’ll take care of you.
Well, the reamer spec at the .200 wasnt what my smith and I agreed upon, and is a conversation being held currently. I’m measuring .4730 even after running it through the Wilson die. I’d prefer not to mess with modifying sizing/seating dies that should long outlast many barrels. My bullet central micron sized the .200 to .4705, but switched to Wilson and it’s not sizing it at all in that area. Honestly, I wouldn’t have known my chamber is possibly off spec had I not switched to Wilson. If the Wilson isn’t designed to size to wheeler #1 spec, than I bought the wrong die, if it is, than I have a bad die. Waiting to hear back from Wilson.
Is this a 6 br of 6 bra ? You mentioned wheeler #1 and that’s the reamer Wilson specs they’re BRA die off of although they do not share the resizing specs I can post the numbers my Wilson BRA die originally produced if so.
Yes, its for a 6BRA with a wheeler #1 reamer, with the exception of a .120 freebore.
What specifically were the desired chamber dimensions that you gave to you smith, for starters. Second, if you were spec'ing the chamber around an existing die, how did you confirm the die dimensions? Third, pressure plays a big role here and brass life, really without much regard for if the die touches the .200 line of the brass or not. Which brings me to number 4. If the same reamer was used to cut the die as was used to cut the chamber, and either the brass has been hammered pretty hard and/or several times, the brass will get tight in it unless it was polished out enough to prevent it from getting to that point.
I've got more questions but that's a good start.
Wilson 6 bra full length die numbers are in the right, this is before I had them hone it just a tad bit. The top diagram is the fired cases on that reamer.
Attachments
Those look like good numbers to me, that should work well together for a long while. I agree on honing it just a tad but we're splitting a pretty fine hair.
- My case does not go all the way into my die. What do I do?
Please send your cases to us with a note about what the problem is and we will open up your dies to fit your cases. You will only be responsible for the shipping charges. If you include a check for $10.50 (USPS) that should cover shipping if in the USA and you have no more then two dies.
Please correct me if I’m wrong. My understanding is the reamer used by the smith was the wheeler #1. However, that would put the .200 at .4715, not .4730. It is also my understanding is that the Wilson die is also based off wheeler #1, it should be sizing at the .200.
urbanrifleman
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yup.
It may well be a tolerance stacking issue. Not a thing in this world is perfect and the stated tolerances on just the reamer itself is likely .+0004-.0005. Add a liitle to each thing along the way and you could get to near your measurement. BTW, what too did you use to measure with? Calipers...I hope not. Even the best are NOT intended nor designed for this kind of precision. A very good mic and a trained hand are needed to reliably measure in tenths.
If you will, please respond to my other questions and comments. Just trying to help but I don't know you from Adam , hence I have no idea of your qualifications. Just trying to get there.
I have no personal reamer. I had a barrel spun from a reamer print with an understanding that it is wheeler #1 with a slightly longer freebore. The Wilson sizing die was purchased due to being in a pinch with my Bullet central micron die, and the hopes it was infact based off a wheeler #1 reamer. 3x fired brass sized in my bullet central is spot on .4705 using calipers. Running 3x fired through the Wilson sizing die and it is .4730 still using calipers.
I'm gonna emphatically state that calipers are the wrong tool for the job and I'm gonna bow out here. Good luck to ya.
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It only goes downhill from there
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It only goes downhill from there
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+/- .001 = .002 in a Mitutoyo freakin lab
Simplest fix is to spray a tiny bit of Kroil or Free All on a q-tip and then rub it on the inside of the Wilson seating die and you will see the rounds drop out very easily.
Dave
Reamer details are above my pay grade but the last I heard ...473 is the bolt face not the reamer spec at the .200 line which should be around .471
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