Blown primer in .243 Ackley

[adam32]

I think the concern people had was that you listed COAL and not BTO so people were questioning how you knew how far you were off the L&Gs.[/QUOTE]
yes there is that
actually I have never read where he listed the COAL...only how far off the lands which is not the COAL
The boxes on QL as for cartridge length, COAL, bullet length seating depth, barrel length.
If the bullet is not listed you have the option of creating the bullet profile
but no where does it ask for distance from the lands. So it became very hard to help problem solve and one member indicated resistance from the OP.[/QUOTE]

2.740

 

[denobravo]

I think the concern people had was that you listed COAL and not BTO so people were questioning how you knew how far you were off the L&Gs.

yes there is that
actually I have never read where he listed the COAL...only how far off the lands which is not the COAL
The boxes on QL as for cartridge length, COAL, bullet length seating depth, barrel length.
If the bullet is not listed you have the option of creating the bullet profile
but no where does it ask for distance from the lands. So it became very hard to help problem solve and one member indicated resistance from the OP.[/QUOTE]

2.740[/QUOTE]
thanks bro
could you measure the bullet length, the ogive lenth, and the trimmed cartridge length as well?

 

[adam32]

QL...after I changed the shot start pressure.

 

[Rich Coyle]

could you measure the bullet length, the ogive lenth, and the trimmed cartridge length as well?

What is "trimmed cartridge length"?

 

[coyotezapper]

QL...after I changed the shot start pressure.View attachment 116840[/QUOTE

Ok, measuring method is CUP and not PSI so you need to convert it to PSI. 55,200 X 1.516 = 83,683.2 minus 17,902 = 65,781 PSI.

 

[adam32]

The 55,200 is the QL default MAX for the cartridge, but a .243 Win is 60,000 so I'm not sure what is correct?!?

 

[coyotezapper]

TheSI 55,200 is the QL default MAX for the cartridge, but a .243 Win is 60,000 so I'm not sure what is correct?!?

65K is correct for PMAX you just have to convert it to PSI. Have you done any chrono work yet?

 

[243winxb]

http://www.accurateshooter.com/cartridge-guides/243win/

AL data with H4831sc

H4831sc 44.0 grs WLR 100 Nosler Partition 3050 fps

Note that all copper or partition bullet will increase pressure and require less powder.

Donut??

 

[NEMTHunter]

65K is correct for PMAX you just have to convert it to PSI. Have you done any chrono work yet?

52,000 CUP is PMAX or 60,000 PSI is PMAX. Per ANSI specs.

 

[adam32]

65K is correct for PMAX you just have to convert it to PSI. Have you done any chrono work yet?

Not yet. It's been raining so once it gets a little drier I will.

 

[coyotezapper]

52,000 CUP is PMAX or 60,000 PSI is PMAX. Per ANSI specs.

Where are you getting this info?? SAAMi only recognizes the 280AI last time I looked.

Ok, I just looked on the SAAMI website and they do not recognize the 243AI at this time.

 

[NEMTHunter]

Where are you getting this info?? SAAMi only recognizes the 280AI last time I looked.

Ok, I just looked on the SAAMI website and they do not recognize the 243AI at this time.

No they do not BUT the .243 is 52,000 CUP or 60,000 PSI. So I would use the same Specs established for the .243 for the .243AI. After all it still the same brass.

 

[adam32]

No they do not BUT the .243 is 52,000 CUP or 60,000 PSI. So I would use the same Specs established for the .243 for the .243AI. After all it still the same brass.

Correct, the parent case specs are used. Just like in the Shermans and Allen Mags, etc.

 

[denobravo]

What is "trimmed cartridge length"?

his stated trim length is the SAMMI default 2.045 for a standard 243
If he trims say to 2.035 like most do it changes the inputs
just a little

 

[denobravo]

What is "trimmed cartridge length"?

QL...after I changed the shot start pressure.View attachment 116840

I inputted everything you did except the shot start pressure which I dont understand why you changed, maybe you can expalin why
I used the 46 grains you shot with your blown primer and
The program says its over pressure do not use