I'm just getting started in the world of 6mmBR. I've got Lapua cases and some 105 Berger Hybrids to start with. When chamfering the new case mouths should I use my standard RCBS chamfer tool or would a Lyman "VLD" chamfer tool be a better choice. Does it matter?
Inside neck chamfer tool for 6BR
- Thread starter Charlie-NY
- Start date
rwj
Gold $$ Contributor
Not sure if it matters, but I use a VLD profile… this one specifically…
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urbanrifleman
Site $$ Sponsor
Yes. Lyman vld is what I have used for 25 years.
this. . .
kmshooting.com
Case Neck Chamfer Tools (Controlled Depth Tapered Reamers)
A shallow angle chamfer on the case neck for smooth bullet seating while controlling the depth of cut with stop fingers that register on the case mouth.
kmshooting.com
One Eye Pete
Gold $$ Contributor
Bugs above just beat me to it but for what its worth my favorite all around inside neck chamfer tool is the K&M. It is adjustable (very easy to adjust) controlls the depth and pilots off the flash hole. I believe it gives me the most consistent chamfer of any hand held chamfer tool.
As far as how important the inside neck chamfer is, what I have found is that a poor chamfer can cause poor bullet seating, will result in large variations in bullet seating force, and can even damage the bullet jacket as it is seated.
Thats not to say you cant get a decent chamfer with an RCBS tool but I have both and I think the K&M does a better job.
As far as how important the inside neck chamfer is, what I have found is that a poor chamfer can cause poor bullet seating, will result in large variations in bullet seating force, and can even damage the bullet jacket as it is seated.
Thats not to say you cant get a decent chamfer with an RCBS tool but I have both and I think the K&M does a better job.
I use the Lyman VLD tool and have used it since I have been hand loading way back in the mid-90s. Works well for me.
I would like to upgrade to get consistent chamfer. Should I order the .17 to 6mm version or the 6mm to .338 one? The 6mm is on the cusp of both!
One is a 3 flute cutter and the other is a 6 flute cutter. That may help you decide.
and this too! anyone out there actually use them?
sqrlgtr
Gold $$ Contributor
religiously... I have both the small and large. I like the way they index off of the case mouth.... consistency is your friend in the accuracy game......
One Eye Pete
Gold $$ Contributor
I have two of the 6mm to .338 version. I shoot 6mm and 7mm in competition so I keep one set for each case neck size. The 6mm to .338 works just fine on 6mm case necks.
Have Both the Rcbs has a Longer Taper than the Lyman
If you take the time to get it set up correctly it's great! That said I've seen more cases wrecked from a machine that was set up poorly. By wrecked I mean a inside chamfer that is a 1/16" or more deep.
Paul
K&M
It looks like opinions vary widely on this and everyone seems to be getting the results that they want using different tools and chamfer angles. I assume that it doesn't matter that much.this. . .
Case Neck Chamfer Tools (Controlled Depth Tapered Reamers)
A shallow angle chamfer on the case neck for smooth bullet seating while controlling the depth of cut with stop fingers that register on the case mouth.
However, the KM tool does seem to make a lot of sense. I always wondered if my chamfers were at consistent angles (from case to case) when doing the task by hand. The KM should help keep the cases at a 90deg angle to the cut. I also never considered the depth of the chamfer; just tried to use consistent pressure and duration by hand when cutting. Looks like the KM tool address this too.
For those of you who use the KM tool; do you spin by hand or are you using the adaptor for a drill or similar tool?
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It just dawned on me I had one of those k&m tools about 5 yrs ago. I didnt like it for some reason or other. Have memory of taking too long to find the flash hole on smaller Lapua cases and biting into the brass cause it was too sharp, so I would back it out a hair and then not be indexed. Or something like that. Really all a chamfer does is take out any burrs on new brass by cutting a tiny bevel. So I went back to using my old Redding rocket with a couple of twists by feel. The bullet dosent touch the bevel of the chamfer so not critical. I planted 5x at .18 yesterday with new brass chamfered with the Redding Rocket. It works!
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One Eye Pete
Gold $$ Contributor
I always use it by hand. It cuts real fast and clean.
Tesoro above does make a good point in that on small flash hole cases it can slow you down a bit, when inserting the guide rod through the flash hole. However, I have gotten used to using it and it isn't that much slower.
RICK SMITH
Silver $$ Contributor
I have found using the K&M tool, the 6mm to .338 that at the end of the bevel there is a burr left on my case's. Doesn't do it with the smaller one from K&M. You can feel it when you set bullets by hand on a arbor press.
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