OGIVE Distance

[Rick Ratzlaff]

Wow Ya'll gave me lots to think about. I'll re-digest on Friday. I spin the case mouth with a coper brush and RCBS electric case prep machine. I count to 10 revolutions on every case then pull it.

 

[Bc'z]

Wow Ya'll gave me lots to think about. I'll re-digest on Friday. I spin the case mouth with a coper brush and RCBS electric case prep machine. I count to 10 revolutions on every case then pull it.

Get rid of copper brush immediately, I bet that's where your inconsistency is coming from.
Use a nylon brush and it only takes a couple passes.

 

[Fuj]

Yep, just a nylon brush in and out with no twisting. The whole deal
is to not mess with the carbon in the neck.

 

[6.5 forever]

Fired maybe 2 times. Winchester and Barns brass. Never anneled. I'm not that OCD, YET

Annealing has as much affect on consistency as any thing else. My opinion.

 

[6.5 forever]

Get rid of copper brush immediately, I bet that's where your inconsistency is coming from.
Use a nylon brush and it only takes a couple passes.

I have stopped brushing inside the case neck.
I run my cases in walnut for a hour before annealing. After sizing they get another hour.
My SD showed a good improvement.

 

[Bc'z]

I have stopped brushing inside the case neck.
I run my cases in walnut for a hour before annealing. After sizing they get another hour.
My SD showed a good improvement.

I also use walnut with the rouge in it, last year i moved away from it with my match brass.
Currently just wype off with alcohol or brake cleaner lube and size, 2 passes with nylon brush in the neck after chamfer.
No power tools used in my prep process, but I seldom prep more than 100 cases at once.
I don't shoot over a chronograph but do watch my X count witch is about 80%.
Trying to nail down how I can pick up the remaining 20%.

 

[JFrank]

Not to discount the fine input of my fellow competitors but I’ve recently moved to a slow turning power tool with a nylon brush, my accuracy one seating depth comparator tells me that 95% are within .0005. I have an occasional .001 variation that I move to sighters. I’ll have more information after this next season but so far I’m quite pleased.

Jim

 

[6.5 forever]

Not to discount the fine input of my fellow competitors but I’ve recently moved to a slow turning power tool with a nylon brush, my accuracy one seating depth comparator tells me that 95% are within .0005. I have an occasional .001 variation that I move to sighters. I’ll have more information after this next season but so far I’m quite pleased.

Jim

Jim thanks for your info. This is how we learn. My current process of not cleaning inside necks was observing the inconsistency of newer brass. Since I stopped brushing my SD dropped from 6-7 to 3-4. I'm sure that there are other factors in my process that work with non brushing inside case necks that gets those results.

 

[JFrank]

That’s a good SD number, congrats. I’m careful not to remove the carbon inside the necks, just burnish evenly and take note of the consistent feel seating with an arbor press and each round gets checked for depth on the gage.
I also de burr and chamfer each time I prep brass.

Jim

 

[6.5 forever]

That’s a good SD number, congrats. I’m careful not to remove the carbon inside the necks, just burnish evenly and take note of the consistent feel seating with an arbor press and each round gets checked for depth on the gage.

Jim

Good explanation Jim. Thanks

 

[Rick Ratzlaff]

Wow I can't thank enough. I had no imagination that polishing with copper brush would be detrimental. I'll ditch that Thanks again!