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20 ppc AI

One of my absolute favorite 20PPC set-ups. This was a "Sage Rat" killer in the Northern Nevada Alfalfa Ground Squirrel fields. Was deadly to 450 yds, and quite often to over 500 yds. 11- twist Krieger HV bbls with 40 gr V-Max or 39 gr Sierra bullets. 3950 fps. I liked it better than the 20 BR's with much better bbl life.
 

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MTSLW

What heavy .17 bulletin are you using in your .17 PPC AI?
Be sure to share a few pictures and details of that project.

Thanks
Hal
I have a few hundred 32 and 35gr Reeds, and several hundred 30gr BlackHole’s. Fire forming I’m just using 25gr Hornady.
Sizing dies are 3-4months out from both Hornady custom or a resize reamer. Should have ordered a resize reamer when I ordered the chamber.
IMG_6933.jpeg
20BRA, 17PPCAI, 20 PPC turned (didn’t have turning mandrel for .17), 17-204, 22ARC.
IMG_6925.jpeg
Cut down my 17-204 barrel and rechambered while I’m waiting for Carson to get me a new 9 twist Lilja. At least I can form brass.
 
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I have a few hundred 32 and 35gr Reeds, and several hundred 30gr BlackHole’s. Fire forming I’m just using 25gr Hornady.
Sizing dies are 3-4months out from both Hornady custom or a resize reamer. Should have ordered a resize reamer when I ordered the chamber.
View attachment 1645159
20BRA, 17PPCAI, 20 PPC turned (didn’t have turning mandrel for .17), 17-204, 22ARC.
View attachment 1645160
Cut down my 17-204 barrel and rechambered while I’m waiting for Carson to get me a new 9 twist Lilja. At least I can form brass.
Who makes 17 ppcAI sizing die?
 
Hornady will make one based off your reamer print and 3 pieces of fired brass.
I'm having a resizing reamer made that is 2.5-3 thousands smaller than the chamber reamer, Newland make blanks you can ream out to make a resizing die.
Is it a Bushing die?
 
Here is why I think the 20PPCAI is the perfect cartridge if you wanna run 39,40 and 55's. I mocked up 2 rounds showing were my 39 TNT are I run and what a 55 would be at the exact same CBTO which is right at the lands. Mine is zero freebore.
On the left is the 39 on right is 55.
Getting you off the subject, is the 20 TNT as nasty as the 6MM and the 22? The 6 and the 22 are like a maypop tire. Just looking for a reason to hit a bump and explode. Hit a PD in the head and nothing left of the head but the neck bone.
 
After four 20BR's (no AI version), I've averaged 900-1000 rds of barrel life (all 9-twist Kreiger or Bartlein bbls and the 55 gr Berger)...except one that went 1500 rds before changing it out (i still don't know why it went that long). That particular barrel (Bartlein) did shoot some amazing groups at 100 and 500 yds though in its earlier life.

What velocities do you shoot the 55s at in your 20BR's?
 
Die blanks came this week

Both sent to gunsmith to get reamed & nitrited
Barrel is supposed be June/ July delivery- when ever Hodoo gets it done..;)
 

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