How much is enough?
- Thread starter waco
- Start date
fiver
Well-Known Member
see how far out you can go.
that much engraving would be a bit of a disappointment to me.
try to get all 4 lands to impress a square cut in the nose.
or at least get it out enough to scuff that front drive band in the ball seat area.
what happens when you do that is the bullet [and case] gets lifted up and pulled into alignment with the barrel.
that much engraving would be a bit of a disappointment to me.
try to get all 4 lands to impress a square cut in the nose.
or at least get it out enough to scuff that front drive band in the ball seat area.
what happens when you do that is the bullet [and case] gets lifted up and pulled into alignment with the barrel.
Been my experience that seater die marks on the nose are mostly an annoyance, nothing more but then I don't shoot bench rest matches and measure groups in the thousands either. I did a bunch of testing with the check seated a bit below the NK as your picture shows and with normal pressure loads (not trying to push the envelope) couldn't find that it really mattered vs seated fully inside the neck. I used to get all wrapped around the axle about that probably cause the books said I was supposed to but as Ian says, it only matters when it matters and I found no difference.
Let us know what your shooting says about.
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Let us know what your shooting says about.
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waco
Springfield, Oregon
Lamar. I do have nice marks all the way around the nose. If I seat it too much farther out, I can't close the bolt without A LOT of force.
Maybe the pic just doesn't show it that well?
Rick. My loads for the .300 Savage were seated deeper than this and the result were not horrible.
I'll post results when I can get back out and shoot.
Maybe the pic just doesn't show it that well?
Rick. My loads for the .300 Savage were seated deeper than this and the result were not horrible.
I'll post results when I can get back out and shoot.
fiver
Well-Known Member
it's the area right in front of the case mouth.
it tapers down into the actual bore/groove area of the barrel.
dang it saami's site isn't up right now or I'd pull it up and point to it.
]>=
anyway the end of a rifles chamber is shaped like that.
the ] is the end of the chamber and is your maximum case length.
then the > is a slight tapered area leading into the = rifling.
we have a convex tapered shape right there to deal with.
if you look at Ben's thread on the 311666? you'll see that big long drive band that has a taper,
somewhere along that part of the bullet will mimic the ball seat area.
behind it the 311 straight part is for the case neck.
it's actually a pretty good imitation of a pound slug.
it tapers down into the actual bore/groove area of the barrel.
dang it saami's site isn't up right now or I'd pull it up and point to it.
]>=
anyway the end of a rifles chamber is shaped like that.
the ] is the end of the chamber and is your maximum case length.
then the > is a slight tapered area leading into the = rifling.
we have a convex tapered shape right there to deal with.
if you look at Ben's thread on the 311666? you'll see that big long drive band that has a taper,
somewhere along that part of the bullet will mimic the ball seat area.
behind it the 311 straight part is for the case neck.
it's actually a pretty good imitation of a pound slug.
Ian
Notorious member
I'm a lot more concerned about there being nothing to support or even guide the middle of the bullet as it first begins to move than I am about having a lube groove poked down into the powder space.
What you have there is what I call a "Lyman manual load", where stuff goes together sorta and works ok at mid-range velocity, but isn't going to do well when pushed at high speed/pressure because there's too much going wrong during the launch. Richard and John Lee would explain this as a compressive strength failure of the alloy, someone else would explain it as exceeding the practical limitations of the rifling twist with cast bullets, and I explain it simply as a failure of fit and balance in the system which results in a non-balanced, non-symmetrical bullet when launched at high speed. It's like putting a 600 HP engine in a Buick Century...it might have the power to do 200 mph on a track, but the suspension and tires quit on the first turn and put you into the wall.
What you have there is what I call a "Lyman manual load", where stuff goes together sorta and works ok at mid-range velocity, but isn't going to do well when pushed at high speed/pressure because there's too much going wrong during the launch. Richard and John Lee would explain this as a compressive strength failure of the alloy, someone else would explain it as exceeding the practical limitations of the rifling twist with cast bullets, and I explain it simply as a failure of fit and balance in the system which results in a non-balanced, non-symmetrical bullet when launched at high speed. It's like putting a 600 HP engine in a Buick Century...it might have the power to do 200 mph on a track, but the suspension and tires quit on the first turn and put you into the wall.
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My NOE moulds do just fine but none are bore r
I had been married 4 years and had just finished pharmacy school.I was a senior in High School in 1992. Lol!
Ian
Notorious member
That's right. Just keep that note in the back of your mind.