6Willbird, new wildcat large frame AR project ctg

[willbird]

Got started on barrel contouring :-). 

[Armed Eye Doc]

4 hours ago, willbird said:

Got started on barrel contouring :-). 

Thanks for the update.

[willbird]

Got contour done. Did not get fancy with any tapers, ended up 2lbs 7oz so 7oz heavier than the Faxon 18" pencil

 

Next is gas port, I bought a 5C indexer and ordered a tailstock to match it so that should be here tmw maybe. 

Edited February 8, 2023 by willbird

[98Z5V]

That's gorgeous, brother - very well done! 

[willbird]

 

Lubed everything really well, not submerge in a vat of mobil 1 well, but poour on the CLP well :-). 

Started with gas port at .07....first round was in a fire formed case and at 44.0 of H4350 and an 87 vmax, bolt locked back. Tried 45.0, and 46.0...saw a bit of ejector mark at 46 so just held there for now. QL says 55468 PSI at 46 but of course that is all theoretical. Tried 3 rounds in mag at .07 and did not feed. 

went up in sizes roughly .005 at a time

.076

.081

At .086 fire forming rounds feed and eject 100%....not throwing them far but feeding and ejecting. Theory with fire forming is that some velocity is lost forming the case.

 

Rounds loaded in fire formed brass eject with a bit more velocity on the ejected brass.  I am going to run it there for a bit and see. Did not setup crono, was not trying super hard for accuracy but 5 shot groups were looking like MOA or so. 1/2 gallon milk jug was at 75 yards and half milk and half water, bullet impact made a heck of a WACK :-). 

Edited February 11, 2023 by willbird

[willbird]

OAL was 2.710" with 87 vmax.

[98Z5V]

VERY COOL!!!

[willbird]

Picked up a 500 pack of blem Sierra 80 grain Blitz from Powder Valley...they should work well in this setup. They give up a bit of BC to the 87 VMAX but at 300 yards that works out to another 1.5" of wind drift in a 10mph so no big deal....well it is always a "deal" but I can live with it LOL for 20 cent bullets.