All reamers that 4D offers for rental
are right hand or clock-wise cutting.
In other words, all reamers should be turning to the right. If the barrel
is in a lathe the barrel will run in normal forward direction or counter
clock-wise.
We have some videos prepaired that help explain the use of
gunsmithing tools, click here to see what we have.
Why is this important?
Because running the tool backwards
will damage it. Damage will likely require a professional resharpening,
your deposit would then be forfeit to cover that expense. Not only that
but it will take about a hundred years to ream a chamber in reverse and the
quality of the chamber will be very poor.
Do I need to use a lubricant when
reaming?
Absolutely, we recommend Brownell's
Do-Drill, Conoco makes a cutting oil called "Spectrum" These are
two oils that will work well, there are others.
How long is the rental for?
You have ten (10) days from the time
it arrives at your address to use the tool. As soon as you are finished
with the tool please return it so that it will be available for the next renter.
Who pays the return shipping and
insurance?
The client agrees to pay the return
shipping as part of the rental fees. Be sure to insure the package as you
are responsible for the tools until we receive them.
Do you sell Reamers?
Yes, they are strictly on a special
order basis, we can often supply common calibers in a week or two, headspace
gauges too. Email us with
your requests.
How do I make a chamber cast?
We recommend
CerosafeŽ casting metal, it is a low temperature metal designed for making
precision casts of cavities. It's properties are well known in the gun
industry and reamer makers as well as gunsmiths will recognize the brand
name. Simply follow the link above for instructions on use.
What is the difference between Solid
and Floating Pilot?
Solid pilots are integral to the
reamer, they do not move and are ground to the common SAMMI dimension for the
given caliber. Floating pilots or bushing pilots are a precise slip fit to
the pilot area of the reamer, they can be interchanged to allow for the best
possible fit to the bore. Which is
better? That is a subject of ongoing debate
in the gun trade, about 50% of clients prefer one or the other. Floating
pilots have the advantage of versatility, Solid pilots do not run the risk of
stacking tollerances. Both types of pilots will produce excellent
chambers.
How do I use Ackley Improved Headspace
Gauges?
In rimless bottleneck cases you will
use an Ackley 'Go' gauge. The 'Go' gauge for the parent cartridge will
become the 'No-Go' Gauge. Why does this work?
Ackley was pretty smart, he realized that if he set
up the "Improved" chamber shorter than the factory chamber that you
would be able to fire factory ammo. Because the brass is slightly crushed by the
neck/shoulder junction of the new shorter chamber it is held tight against the
bolt face for firing. That is why you must set the barrel back when
rechambering for a rimless bottle necked cases in Ackley Improved configuration.
Why no Ackley gauge for rimmed or
belted cases?
Simple, these cases are headspaced on
the rim or the belt, so the shape of the chamber has no affect on
headspace. The case is trapped between the boltface and the forward edge
of the rim or belt, so when you fire the cartridge it simply forms to the new
shape of the chamber.
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