185 gr wadcutter with unique

rparker1866

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Oct 28, 2022
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hello
im using 6.6 gr to 6.8 gr of unique. in a 45acp. i am getting 75 fps differance with 6.6gr.
and 78fps differance with 6.8. im anywere from 990 to 915.
is that what i should expect?
thanks
 
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I'm thinking some kind of .45...?

Regardless, that's a big spread, and I suspect something is off. Is this all using the same brand and lot of brass?
 
Unique from most measures, vari by 2/10 grs. But range brass is the worst.
Bullet pull can be any where from 45 lbs to over 100 pounds to move the bullet.
 
Are you using mixed brass?

How consistent is your COL?

How are you measuring your powder?
the brass is mostly Winchester and R-P. but yes mixted brass
im loading on a dillion 550. my COL is very consistent. 1.25 OAL
im using the dillion powder drop. its consistent. plus or minus a 10th
my crimp with a lee factory crimp die is .470
thanks for the reply
 
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That's actually not that bad a spread for a 185 in .45 ACP at a relatively light level. Not great, not bad.

That's kind of what I was thinking. That is a fairly light load for Unique with the 185's...

the brass is mostly Winchester and R-P. but yes mixted brass
im loading on a dillion 550. my COL is very consistent. 1.25 OAL
im using the dillion powder drop. its consistent. plus or minus a 10th
my crimp with a lee factory crimp die is .470

The only thing I would change on that is the Lee FCD... I would try one brand of brass, and use a standard taper crimp... as a troubleshooting step. As I mentioned, that is a fairly light load, even for Unique... and as LV suggests, I wouldn't be too worried about the velocity spread if it looks good on paper. If you are having accuracy issues, then that is a whole 'nuther story.
 
A- What crimp die are you using? Do you crimp in a separate operation or are you seating and crimping in one operation?
B- What kind of chronograph are you using?
C- Load at least 10 rounds that are all the same brand and all have the same TTL, weigh each change on your scale. seat bullets and crimp in separate operations. Re-test.
 
Ditch the Lee FCD!

You’re amplifying the differences between makes/lot#s of brass by reducing the size (diameter) of the bullets by squeezing them through the FCD. (Case wall thickness).
I use Lee dies and have burned many pounds of Unique. I use mostly the 200gr SWC and get splendid accuracy from the .45’s.

I use a Lee “RIFLE” FCD, on .30/30, .35Rem, .308MarlinExp, and .338MarlinExp. And .45/70 to prevent bullets from collapsing in a tubular magazine.
But NEVER with a straight wall case pistol cartridge.

It's an entirely different design…

The carbide sizer ring in the PISTOL FCD sizes the OUTSIDE of the loaded cartridge which includes the lead bullet inside the case.
I’ve seen hollow base wadcutters that in mixed brass will shoot 1.5” groups at 50yds, But run them through a .38spl FCD and you get 1.5 foot groups with key-holes…
You can however punch out the Carbide sizer and still use the crimp, but that defeats the purpose of the FCD die which is to assure the ammo “plunks”.
Ok for run-n-gun blasting, but not for PPC or Bullseye type shooting where accuracy is paramount.
 
Ditch the Lee FCD!

You’re amplifying the differences between makes/lot#s of brass by reducing the size (diameter) of the bullets by squeezing them through the FCD. (Case wall thickness).
I use Lee dies and have burned many pounds of Unique. I use mostly the 200gr SWC and get splendid accuracy from the .45’s.

I use a Lee “RIFLE” FCD, on .30/30, .35Rem, .308MarlinExp, and .338MarlinExp. And .45/70 to prevent bullets from collapsing in a tubular magazine.
But NEVER with a straight wall case pistol cartridge.

It's an entirely different design…

The carbide sizer ring in the PISTOL FCD sizes the OUTSIDE of the loaded cartridge which includes the lead bullet inside the case.
I’ve seen hollow base wadcutters that in mixed brass will shoot 1.5” groups at 50yds, But run them through a .38spl FCD and you get 1.5 foot groups with key-holes…
You can however punch out the Carbide sizer and still use the crimp, but that defeats the purpose of the FCD die which is to assure the ammo “plunks”.
Ok for run-n-gun blasting, but not for PPC or Bullseye type shooting where accuracy is paramount.
Lee now makes the Collet-Style Crimp die which is like the rifle crimp dies. They have no carbide ring. I cast bullets for my 38/357 and don't have the collet die yet, but I'm considering one to test the difference.


Midway link, I'm sure it can be found for less elsewhere.
 
As mentioned by LV Gun, what kind of accuracy are you getting? If it is acceptable you are wasting time and resources worrying about a non-issue.

Kevin
 
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