16ga.com ~ View topic

Joined: 24 Jul 2016 Posts: 548 Location: Ohio

How many you need? PM me.

there definately is something off between your readings and the old stuff . If you notice in the 95 data , that even the AA comp shows that much GD , and the Activ G28 is the same wad that is the G wad nowadays . And , it's peculiar that THAT wad would show up in the AA and not the Remmie !

I have the WAA16 wads so I think I'll send them in with that load.
I didn't have any data until I got that link.

Thanks

Jim

Joined: 27 Oct 2017 Posts: 80 Location: Joliet, IL

If it were me I'd test my scale before trying again. Check weights or another scale?

If you are loading on a machine instead of individual weighing maybe run through 10 or so and cut apart a couple from the end of the run and see if working the machine is settling your powder drops?

Measure your crimp depth? If you look up Tom Armbrusts article on that you'll see a couple thousand psi increase from excessive crimp depths.

Something has to be off in my mind because your load recipe is light compared to the data.

I will certainly check the scale, I have check weights. I do have two scales. One digital and one beam. I use the beam for powder, the digital for shot.
Tom asked me not to change the crimp depth. I will measure it though.
I suspect if the published load comes in high, then he will have me adjust the crimp depth.

Jim

Guest

I agree that something is out of whack here. That Claybuster wad is a loose fit in a Federal hull.

Member Joined: 30 Nov 2011 Posts: 1698 Location: Minnesota

Jim Can you post/pm what the 20 ga/Gr dot load is that you sent in? Did it use the Ch209 primer like has been talked about on trapshooter?Thanks

Paperwork came today.
Here are the 4 loads I sent in.

I can scan and email to anyone who wants it. Just PM me.

16 gauge Federal Hull Federal 209A primer. 15/16 oz. #9 Claybuster CB0078-16. 17.5 grains Green Dot.
Velocity Avg. 1276 EV 27-----PSI Average 14380 EV 1000

16 gauge Federal Hull NS688 primer. 15/16 oz. #9 Claybuster CB0078-16. 17.5 grains Green Dot.
Velocity Avg. 1261 EV 34-----PSI Average 13420 EV 1000

20 Gauge Remington STS Hull NS688 primer. ¾ oz. #9 Claybuster CB1075-20 wad. 13.5 grains Green Dot.
Velocity Avg. 1252 EV 29-----PSI Average 11820 EV 500

.410 Win AA Hull. NS688 Primer. ½ oz #9. Claybuster CB5050-410HS wad. 16.5 grains of W296.
Velocity Avg. 1309 EV 69-----PSI Average 9640 EV 2100

Makintrax73,

I looked it up.
http://www.armbrust.acf2.org/primersubs.htm
Very enlightening.
An almost 4000 psi difference between .030" and .090".

I measured mine vs. factory.
Factory was .030" Mine were .075".

Maybe we found the answer.
I never really paid much attention to crimp depth, but went by what looked right.
The factory crimps don't look right to me.
I very rarely buy or shoot factory ammo.
I think I learned something very valuable here.

Jim

Joined: 08 Feb 2009 Posts: 1310 Location: Western WA

So the only thing pressure testing is telling us is how deep our crimps are? I hope there is more to it than that, and I say this only partly in jest.

A 4000 psi swing swamps just about everything else.

B.

If crimp depth is that important, it should be one of the listed parameters.

Tom said he would test the known published load for free. I may send the same load that was over pressure and pay for it with a proper crimp of .030".
It just can't be the wad. I doubt it is a bad batch of Green Dot although that 20 gauge load I sent in was on the upper edge.

I tested my scales. They look good. The beam scale was right on the money.
I weighed the shot on the beam as well. 410 - 413 grains.

Jim

from your data ... it just seems to me the spread on the pressure readings are radical . I would guess that spread might be tighter on a hot load (really good powder burn). Maybe your wads are going to H.. in a handbasket and giving a variance in sealing .

Joined: 21 Mar 2019 Posts: 523 Location: Texas

Joined: 21 Mar 2019 Posts: 523 Location: Texas

Guest

I stick to Unique/Universal for 1 oz loads. I realize that's not always an option right now with certain powders being hard to find.