16ga.com Forum Index
Author Message
<  16ga. Ammunition & Reloading  ~  2.5 inch pressure test
Gordon Disharoon
PostPosted: Mon Apr 27, 2009 5:11 pm  Reply with quote
Member
Member


Joined: 17 Jan 2009
Posts: 392
Location: Mesquite, TX.

I got a 2.5 inch load form a friend and I had Tom Armbrust test tehm.

The results were

Cheddite hull cut down to 2.5
Cheddite 209 primer
19.2 GR. Solo 1250
Gualande 1621 wad
7/8oz shot.

High pressure was 10,000 in one round
Low pressure was 9000 in one round
The othere three were 9500, 9600 and 9700.

I also sent the same load in Fioccai hulls and the pressure was

12100 for the high and 11400 for the low. Other three were inbetween these

The Federal hull was at 10400 for the high and 9400 for the low.

A Winghester two peice hull was 12400 for the highest and 11400 for the low.

Alll powder was weighed indivudally for each round. All were 6 point crimps and loaded on the same day so atmospheric conditions were teh same.

This was supposed to be a llight load but it is obviously not.

Do any of you guys have a reciepe for a 2.5 load using Solo powder?

Maybe I am doing something wrong but I sure don't know what it is.

My loader is virtually new with only 25 shells loaded in it.

Any suggestions would help.

Regards, Gordon

_________________
Our dogs make our lives better
Back to top
View user's profile Send private message
dogchaser37
PostPosted: Mon Apr 27, 2009 5:46 pm  Reply with quote
Guest





What's wrong with the loads in the Federal and Cheddite hulls, those are well within safe PSI? They also seem very consistent, at least on the pressure side of things.

There is nothing wrong. If you want lower pressures you have to drop the powder charge 1 - 2 grains. If you want them a lot lower you will have to switch to another powder, one that burns a bit slower.

Your reloader and it being old or new has nothing to do with anything as long as the crimp is between 1/32" and 1/16" deep, no swirl, no convexity and no concavity, which from the consistent pressures is probably not the case.

Sir, you just developed 2 nice loads, take a bit of powder out of the other 2 loads and you will have 4 nice loads. As long as the velocities are as consistent as the pressures, you did a nice job!!
Back to top
Gordon Disharoon
PostPosted: Mon Apr 27, 2009 6:00 pm  Reply with quote
Member
Member


Joined: 17 Jan 2009
Posts: 392
Location: Mesquite, TX.

I forgot to post the velocities

Cheddite from 1243 to 1269

Fiocchi from 1251 to 1298

Federal from 1253 to 1277

Winchester from 1286 to1321

Good advice on lowering the powder 2 grains. I will do this and have tehm retested.

Regards, Gordon

_________________
Our dogs make our lives better
Back to top
View user's profile Send private message
dogchaser37
PostPosted: Mon Apr 27, 2009 8:32 pm  Reply with quote
Guest





The Cheddite and Federal hull loads are very nice, keep up the good work.
Back to top
Dave Miles
PostPosted: Tue Apr 28, 2009 3:38 am  Reply with quote
Member
Member


Joined: 27 Jun 2005
Posts: 1539
Location: Michigan

You may want to try some SR-7625 powder if your looking for low pressure loads. Or try some "known" low pressure load data.
Back to top
View user's profile Send private message
Bronco
PostPosted: Tue Apr 28, 2009 5:00 am  Reply with quote



Joined: 17 Nov 2005
Posts: 158
Location: NW Florida

I use your exact load except 16gr of Green Dot. I am awaiting test results on 16gr of GD, RGL cut to 2.5in, 7/8oz in a 20ga claybuster wad with a cheddite primer. Will post results when received. Bob
Back to top
View user's profile Send private message
Twice Barrel
PostPosted: Tue Apr 28, 2009 7:45 am  Reply with quote
Guest





Gordon nice loads for those high flying Texas doves but I agree with DC on dropping the powder charge by a couple of grains for your clays and quail load.

I'm surprised at the large difference between the pressures of the Cheddite and Winchester hulls. When you wrote Winchester 2 piece are you referring to the current production hulls coming from Australia?
Back to top
dogchaser37
PostPosted: Tue Apr 28, 2009 8:01 am  Reply with quote
Guest





Just a note for all of the folks that like to switch components, and don't think that there is any effect. If you will notice, when the pressures went up to 12,000+ PSI, the velocity EV went up also. While 12,000 PSI is not going to hurt a modern firearm, the consistency of the load went away.

Now the hull used might have something to do with the velocity variations also, but again switching stuff changes ballistics. In this case it was a hull change.

Just for a reference point when building and testing loads, keep the velocity EV at 35 FPS or less and the pressure EV at 1,500 PSI or less. Those are good standards to use. If a target load doesn't conform to these standards, try another primer, if that doesn't work, a new powder/primer combination is in order. These are relatively easy parameters to go by when building light field/target loads. Remember these are generally five shot data strings that we are having tested, if you don't keep tight performance specs things will get ugly fast. A good target/light field load will easily pass a 10 or 20 shot data string using these parameters.

As far as pressure goes, as long as it averages at or under max of 11,500 PSI, use the load. I can't overstate it enough that a little bit of pressure smooths out the variations, and generally has no effect on patterns and is NOT a component of recoil.
Back to top
Gordon Disharoon
PostPosted: Tue Apr 28, 2009 6:56 pm  Reply with quote
Member
Member


Joined: 17 Jan 2009
Posts: 392
Location: Mesquite, TX.

Twice Barrel

Yes the Winchester hull was the Australian ones.

_________________
Our dogs make our lives better
Back to top
View user's profile Send private message
Dave Miles
PostPosted: Wed Apr 29, 2009 3:16 am  Reply with quote
Member
Member


Joined: 27 Jun 2005
Posts: 1539
Location: Michigan

dogchaser37 wrote:

As far as pressure goes, as long as it averages at or under max of 11,500 PSI, use the load. I can't overstate it enough that a little bit of pressure smooths out the variations, and generally has no effect on patterns and is NOT a component of recoil.


Dogchaser37, how can you say that pressure is NOT a component of recoil?
Velocity is, and you can't have one without the other.
Two loads using the same components, except one is 1150 FPS @ 7200 PSI
will have less recoil than that load at 1350 FPS @ 10500 PSI.
Back to top
View user's profile Send private message
jchandler
PostPosted: Wed Apr 29, 2009 5:39 am  Reply with quote
Member
Member


Joined: 11 Jan 2006
Posts: 172
Location: Hoosier state

Quote:
Dogchaser37, how can you say that pressure is NOT a component of recoil?
Velocity is, and you can't have one without the other.



Dave,

Actually you sometimes can have your cake and eat it too.
This from Hodgdon reloading manual:

Federal hull Universal powder 1oz shot 1220fps 8200psi
Federal hull Longshot powder 1oz shot 1300fps 8100psi

I KNOW the Longshot load will generate more recoil than the Universal. And it's not from pressure......

Jeff
Back to top
View user's profile Send private message
Dave Miles
PostPosted: Wed Apr 29, 2009 6:14 am  Reply with quote
Member
Member


Joined: 27 Jun 2005
Posts: 1539
Location: Michigan

jchandler wrote:
Quote:
Dogchaser37, how can you say that pressure is NOT a component of recoil?
Velocity is, and you can't have one without the other.



Dave,

Actually you sometimes can have your cake and eat it too.
This from Hodgdon reloading manual:

Federal hull Universal powder 1oz shot 1220fps 8200psi
Federal hull Longshot powder 1oz shot 1300fps 8100psi

I KNOW the Longshot load will generate more recoil than the Universal. And it's not from pressure......

Jeff


That data is the exception, and not the normal rule.
Plus you changed components.
Also, the average person will never feel the difference between 80 FPS.
Most loads will have that much deviation between them.
But you made your point. Wink
Back to top
View user's profile Send private message
dogchaser37
PostPosted: Wed Apr 29, 2009 7:03 am  Reply with quote
Guest





Dave,

The major componenets of recoil are, gun weight, ejecta weight and ejecta velocity. There are other considerations but pressure isn't one of them.
I am referring to actual measured recoil and not felt recoil. Felt recoil is subjective and I am not now nor will I ever comment on felt recoil.

I didn't do the testing, Winchester-Olin did the testing way back in the 1960's, with E.D. Lowry as the ballistician.
Back to top
Twice Barrel
PostPosted: Wed Apr 29, 2009 7:49 am  Reply with quote
Guest





Gordon Disharoon wrote:
Twice Barrel

Yes the Winchester hull was the Australian ones.


Wow with an increase in pressure of 2400 psi between the Cheddite and Winchester hulls perhaps we had better rethink substituting load data between the Cheddite and Winchester hulls that have been proclaimed to be a Cheddite.

Gordon would you mind calling Tom and confirming this data.


Last edited by Twice Barrel on Wed Apr 29, 2009 8:43 am; edited 2 times in total
Back to top
Dave Miles
PostPosted: Wed Apr 29, 2009 7:54 am  Reply with quote
Member
Member


Joined: 27 Jun 2005
Posts: 1539
Location: Michigan

Mark,

I agree with what you said: The major componenets of recoil are, gun weight, ejecta weight and ejecta velocity.

However under most situations you can't increase the velocity, of a givin weight, without increasing the pressure. So you normally don't have an increase in one, without an increase of the other. Just my opinion, and you can always find an exception to any rule. Wink
Back to top
View user's profile Send private message
Display posts from previous:   
All times are GMT - 7 Hours

View next topic
View previous topic
Page 1 of 4
Goto page 1, 2, 3, 4  Next
16ga.com Forum Index  ~  16ga. Ammunition & Reloading

Post new topic   Reply to topic


 
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum




Powered by phpBB and NoseBleed v1.09