The asymmetrical "Bulge" on 9mm. Why?

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I have both, the Redding works better, and is easier to read. Big price difference though, and if you already have a Hornady seater, you can buy just the top to add to it.

I added marker to the Hornady seater so I could read it.
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Other than adjusting it does the sleeve work better on one than the other. Never used a sleeved die. I have Wilson chamber dies for seating match bullets but that's not the same.
 
Other than adjusting it does the sleeve work better on one than the other.
Yes, the Redding Competition Seating die works better.

The Hornady has a sleeve which guides the bullet into the die prior to entering the main die body...keeps your fingers clear from the danger of being pinched. The sleeve then guides the bullet and case until it meets the seating plug.

The Redding has a separate spring loaded seating plunger which is fitted to the sleeve (advertising says that the fit is so tight that when blocking one end of the sleeve with your finger and dropping the plunger in the other end, the plunger will be supported by the column of air inside the sleeve) The sleeve holds the bullet in alignment with the case being held by the die body until it comes in contact with the seating plunger.

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*OP update*

I ordered the Redding competition die from Midway for 109$ all said and done. I appreciate you all steering me in the right direction. Will send updates when i roll some with the new seater die with hopefully no problems.
 
I usually recommend the addition of a Lyman M-die profile expander...to create a "seat/cup" for the base of the bullet.

With a Dillon powder measure, and only 4 stations, I'd recommend the DAA Expander Issert for you powder measure . It might be overkill, but if you switch to coated bullets, it makes seating bullets straight pretty painless
 
+1. I use the DAA M style PTX and it does seem to help. I’m not quite there yet getting the Redding competition seater.
 
I switched from a M expander to a plain Dillon expander when I switched presses, been having great success with the plain Dillon and the Redding comp seater.
Don't think I'm going to upgrade.
 
Received the Mar/Apr 2021 Blue Press catalog, page 8 article:
“The $144.25 Redding vs. the $27.99 Dillon Seating Die!”
I won’t post the contents of the article, but the conclusion in a 50 round seating depth test, was the Dillon produced less deviation in the OAL, .0008 compared to .0013. There was no testing of alignment.
Don’t shoot the messenger...
 
I have seen factory rounds with more bulge than that. If it chambers it's good to shoot. I know that everyone is trying to look for every little thing to help make them more accurate but maybe a little more practice would do more for accuracy than tweaking every aspect of the reloading process.
 
Received the Mar/Apr 2021 Blue Press catalog, page 8 article:
“The $144.25 Redding vs. the $27.99 Dillon Seating Die!”
I won’t post the contents of the article, but the conclusion in a 50 round seating depth test, was the Dillon produced less deviation in the OAL, .0008 compared to .0013. There was no testing of alignment.
Don’t shoot the messenger...
In a single stage press those numbers would get so small as to loose relevance. More importantly that is a single statistic which is not relevant to the problem. Things like how well the seating stem fits the test bullet would be a major factor in both tests.
 
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