TIPS ON SELECTING
A BULLET STYLE
GASCHECK OR PLAINBASE? –
We recommend gas checks without reservation under the following conditions:
If velocities will exceed 1400 to 1600
fps, or estimated chamber pressure will exceed about 35,000/40,000 psi.
For velocities over 1000 fps if shooting
sequence will be rapid enough to heat the barrel until uncomfortable for the
hands, and especially so if atmosphere temperatures will exceed 90 deg F.
In revolvers with notably misaligned
In almost all new handguns which
haven’t had the bore smoothed by lapping. (Extensive jacketed bullet use
helps smooth a little.)
For anyone who shoots so little that GC
cost isn’t a concern, and especially so for beginners loading cast
Whenever optimum accuracy, and, or, ease
of load development takes precedence over slight higher cost and production
When desirable to use one bullet and load
in several guns of the same caliber.
Note that all gas checks sold by Lyman and
RCBS are made by Hornady and are Hornady specs, so you should no longer
specify which brand of checks you’ll be using.
– For revolvers used for hunting we recommend the widest nose offered, for the
quickest kills. Don’t be concerned about ballistic coefficient unless you
intend to shoot at ranges exceeding 150 yards with our lightest weight
offerings, or 200+ yards with the mid to heavyweights. In 44 caliber and larger,
the LFNs are clean quick killers, and if a mid to lightweight 41 is driven at
maximum velocity potential they perform very well. Ross Seyfried likes to say
that handgun bullets don’t have a ballistic coefficient. Keep that experienced
gent's words in mind as you order, and note that our offerings tend to be heavier
than most manufacturers offer. Even though they look too blunt to fly, these
heavyweights keep moving so well and so accurately at longer ranges, that they
make most pistol bullet performance look sick! (See the throat slug and sizing
sections to learn about fitting.) – The same criteria applies to autoloader
handguns and we recommend the bluntest that will feed reliably, except for paper
punching, where SWC’s cut a cleaner hole to make scoring easier.
Since rifle bullets can easily be pushed
fast enough to obtain expansion on game, pick the nose style you prefer and it
will perform well, or for the ultimate game performance purchase a softnose
mold. When softnoses are used on handgun bullets, an impact velocity of
approximately 1200 fps or higher is required to make a pure lead nose expand
WHICH WEIGHT IS BEST?
– We recommend the mid to heavy listings for revolvers. Stay with the standard
available weights in auto handguns, but lean toward the heaviest. In rifles the
throat will determine maximum bullet length, and the longest that will chamber
with the base covered by the cartridge neck will generally be the most accurate.
However, look hard at our FN series in the weights we offer for rifles if you
want a super accurate plinker/game bullet in a lighter weight. Interestingly
enough, it is near impossible to find a gun that they will not shoot very
accurately in! In other words, if you’d like a very universal bullet to use in
many rifles, try one. Shoot them as large as will chamber freely and it’s hard
to do anything wrong! E.g., a 140 grain, 312 diameter will shoot superbly in
almost any 30 caliber rifle, sized down as needed for the tight chambered ones.
The same applies to the 115 grain FN, both listed under 32 revolver. – There is no
available load data for our heavier revolver bullets, and we do not offer any.
However, you can become expert in developing maximum power loads by reading our
book Jacketed Performance with Cast Bullets, listed in the catalog. You
can expect approximately 300 fps higher velocity with LBT gas checked revolver
bullets, when lubed with LBT lubricant, and loads are developed to
take advantage of the power potential built into our designs. This compared to
jacketed of similar weight, and in most cases other cast designs of similar
WHAT ALLOY TO USE?– All listed weights and diameters are with wheel weight
metal. If you’ll be using another alloy you can calculate the resulting weight
quite closely by multiplying our listed weight by .977 if you’ll be using
Lyman #2 alloy or most commercial bullet casting alloys, or for linotype,
multiply our listed weight by .935. Select the listed bullet weight that comes
closest to what you want, and be sure to name your alloy on the order form. We’ll select the closest diameter mold we have in stock, or cut one, to produce the size you need.
DO NOT ADD DIAMETER WHEN YOU ORDER BUT ASK FOR
EXACTLY WHAT YOU WANT, EXCEPT FOR STAR SIZERS WHICH YOU SHOULD ADD .001 TO THE
DIAMETER FOR TO PREVENT LUBE LEAKAGE. WE GUARANTEE THE MOLD WILL NOT CAST