Case chamfer

[Blackstuff]

Hello all,

Its been quite a while since i've had to do any case prep so i'm a little rusty with certain elements so looking for opinions.

I use a Lee Quick Trim Power case trimmer that trims, chamfers and de-burs cases in one go. It could've been 4 years since I last used it. I have attached some pics of the results. Am I the only one that thinks the external chamfer on the case mouth is a bit excessive or would you be happy with it? They're .308Win cases.

[Blackstuff]

Hmm, pics don't seem to be uploading...

[ukrifleman]

Remember that the Quick Trim cutter is adjustable, make sure that it is set to its minimum, turn the knurled ring clockwise when viewed from the blade end until it stops.
According to the Lee instructions, this will trim to .006 below nominal case length.
Lee states you can trim the case shorter by turning the ring a click at a time anti-clockwise, which will remove approximately .001 per click up to a maximum of 10 clicks.
ukrifleman

https://www.reloading.co.uk/lee-quicktrim.html

[Mauserbill]

Hello
Like UKR says it is adjustable, I use them on all my military cases, and results are excellent, no more faffing about with the usual case prep tools.

[rox]

Am I the only one that thinks the external chamfer on the case mouth is a bit excessive or would you be happy with it?

Pictures shouldn't be necessary to answer this. For me, *any* outside chamfer is too much. Inside chamfer is sometimes applied, primarily to prevent bullet shaving. If trimming leaves a burr on the outside, then the outside should be deburred. Chamfering the outside is just weakening the case mouth for no good reason.

My trimmer cuts the mouth completely square and practically burr free. I don't touch the outside, aside from any effect that tumbling-off the lube might have. I usually apply a very light flare instead of chamfering, but with jacketed bullets and neck ID 0.001" to 0.002" under bullet diameter, I could happily load without chamfer or flare and still not see shaving.

[Blackstuff]

Thanks for the replies gents. I was aware that its adjustable, however whether its all the way one way or the other the result is the same.

Its so frustrating not being able to show the photos, but basically it seems dependent on how hard i press on the cutter as to how much chamfer goes on.

I am using the die in a Breech Lock Quick Change bushing, so I don't know if thats the problem? I would've thought that would have the opposite effect though. I'll give it a try out of there and see what happens.

[billgatese30]

I would have thought it will only take a thou or two of flex to make a big difference visually. Consistent pressure is likely to be a help. As said above, I only put enough inside chamfer to prevent shaving and as little as possible externally to keep as much brass in place as possible.

[phaedra1106]

If you want to pop round and let me take a look at them just give me a shout.

I'm out tonight and tomorrow night but should be in Friday most of the day

[Alpha1]

I dont think I have ever chamfered the outside of any cases in all the time I have been shooting. I am not sure I have ever chamfered the inside of a case either. Why would you want to thin the cases.
I use a L.E. Wilson trimmer that cuts the case mouths with no chamfer it just cuts them square I just run a deburing tool round the case mouths to get rid of any rags.
I have expanded case mouths to accept cast bullets but I normally use NOE expanders or a set of macined expanders I aquired from David/Christel.

[Graham M]

Yup just use a Lyman case trimmer when needed and then just run a Lyman deburring tool around inside and out to remove any burred edges.
https://www.reloading.co.uk/lyman-chamf ... -tool.html
Can't see the need to chamfer any of the brass.