log book is an important part of any reloaders equipment,
serving to record what load combinations have been tried in a particular
firearm, and the results
obtained. The value of keeping accurate and concise records will
be obvious to any shooter who has experienced the frustration of
finding a load that performs beautifully in a particular rifle,
only to realize that he has no record of what type or amount of
powder was used. With a good log book, it is a simple matter to
duplicate a load that performed well, or to avoid repeating one
that has been shown to give poor results. In any such log, points
to record are;
in which the load was used.
case make and lot number, as well as the number of firings for that
type, manufacturer lot number, and charge weight.
brand, type (standard, match, magnum, etc.), and lot number.
weight, style, and lot number.
depth, or the cartridges Over All Length (OAL).
complete note section regarding velocity, accuracy, pressure signs.
notes section covering the conditions (range, temperature,
light and wind directions) in which the data was fired. Sight settings
should also be recorded in this section, providing a reference point
for future changes in zero.
type of log book that we have found very useful, is a record of
the number of rounds fired through a particular firearm. This need
not be extensive. Books offered commercially by such firms as Creedmoor
Armory provide areas to record the number of rounds fired in each
range session, the running total of rounds fired in this firearm,
and a brief section for notes regarding cleaning methods, etc..
Such a record can provide valuable insights as to a bores
condition, since most shooters are notoriously poor estimators of
the actual number of rounds fired through a given barrel. A logbook
makes it easier to tell if a barrel may in fact be shot out, or
just in need of a drastic cleaning. It will also allow for an accurate
comparison between the barrel life expectancy of different chamberings,
a subject frequently debated by shooters. Big game hunters will
benefit by keeping a good record on the number of rounds fired,
especially if they do a considerable amount of load development
and testing. The shooters who will reap the greatest advantages,
however, are those who do the most shooting; competitive shooters
and high volume shooters, such as varmint hunters. If you expect
to do a considerable amount of shooting through a particular firearm,
take the time to start a record for it. Here in the Sierra test
range, every barrel receives a log book. Updated each and every
time the barrel is used, these books provide a complete history,
from the time it is chambered to the time it is retired. In reviewing
these, we have formed some very solid and verifiable ideas concerning
barrel life and cleaning methods. We strongly suggest that you keep
a record for each of your rifles as well.
a metallic case, be it for a rifle or handgun, is simply replacing
the component parts that were expended during firing. The case,
normally the single most expensive individual piece of a loaded
cartridge, is reused. It must be returned to dimensions that will
allow it to firmly hold another bullet, and allow free and easy
chambering. The spent primer must be removed, and a new primer seated
in place. The powder, which was consumed in the last firing, is
replaced. A new bullet is seated in the case mouth, and in some
instances, crimped in place.