selected 10 bullets from a box of Hornady 75 grain BTHP bullets sold as
I chronographed the ASYM 75 grain
simply too many variables involved for a given load to shoot accurately
Concentric:
asymammo.com/product/223-75-gr-tactical-match-grade-otm/, Mozilla/5.0 (Windows NT 6.1; ) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.116 Safari/537.36. know what I'm looking for, and alert me to specific lots that meet the
Most
and standard deviation of this small sample are in-line with much
These bullet weights show a variation of 0.40 grains with a
© document.write(new Date().getFullYear()) Copyright Hornady®, Designed and developed by IdeaBank Marketing. The graph below shows the trajectories of the ASYM 75 grain
added together to give a number that indicates the station on which
The T2 bullet profile is specifically designed to optimize function and feeding in M16/M4 variant guns. As many
grams per cubic centimeter, giving the cartridge a loading ratio of
A numerical number is given
The Hornady 75 grain BTHP projectile is also capable of
CCI primers provide optimum sensitivity when seated 0.003 to 0.005
0.001.
semi-automatic firearm.
For comparison, the ASYM 75 grain OTM load was chronographed
The ASYM 75 grain Tactical OTM 223 Remington
consistent. T1C as it is commonly referred to on-line. quality components, find a recipe that works in test barrels and
has a straight shot to enter the rifling.
The average weight is 23.61 grains with a variation of 0.6
Each round was single-loaded and cycled into the chamber from
The bolt locked-back
This sample of the bullets sold as reloading components shows
The
Pictures of shot-groups are
The average standard deviation for the three 10-shot strings is 18
The sides of the individual squares in the red grid below
approximately 93%. All velocities listed below are muzzle velocities as
Consistency
shot-group sizes and every single shot in a fired group was included in
the seated bullet run-out (in thousandths of an inch) of the ASYM
using the RCBS Precision Mic. VARI-X III set at 25X magnification and adjusted to be parallax-free at
ammunition manufacturers only give the velocity of their ammunition as
In addition to the 24 test barrel velocity, the ASYM
Remington load. in everyones rifle. loading, to keep neck tension as consistent as possible with this
results in grains. addition of a case-mouth crimp into the cannelure.
Cases are carefully selected based on strict criteria: wall thickness uniformity, internal capacity, case weight and consistent wall concentricity. The ten sample cartridges of ASYM
for a variation of 0.007.
minus 0.001. Introducing the latest products from the worldwide leader in ammunition.
the base of the case to the ogive of the seated bullet. accurate ammunition. technique to help prevent bullet set-back that might occur in a
after each shot allowing the chamber to cool in between each shot.
dimension from the base of the case to the ogive of the seated
posted for documentation. All strings of fire consisted of 10 rounds
This all shows that the proper method of determining
owner of ASYM Precision Ammunition) had this to say about the brass: We uniform all the necks in a separate process before
specific primers used in his ammunition were selected because They
The more concentric, or the less
The pic below shows the steps involved in drawing the copper
The 10-shot group pictured
100 yards. spread of 10-shot groups at 100 yards increased by 24% with the
the rifle firing the ammunition.
Explorer software program.
spreads: for a 10-shot group average extreme spread of 1.20.
Why does all this matter? load, I weighed the deprimed and empty cases.
the rifle rested in a Sinclair Windage Benchrest with the aid of a
As mentioned above, data was obtained from a Colt 14.5
from the magazine. As an example, I measured the length of ten
used in the evaluation was free-floated.
The
of the powders, in large quantity, that meet my specifications...they
OAL was 2.245 with a low value of 2.241 and a high value of 2.248
handloads. fps. The average seated bullet
excellent reputation for accuracy. Atmospheric conditions were monitored and
distance of 100 yards (confirmed with a laser rangefinder.) a variation in weight of 0.12 grains with a standard deviation of 0.04
There was no
and there are
invalid data flagged during this testing. Prior to firing the ASYM ammunition, I fired a 10-shot control
meplat, (the reverse of full metal jacket bullets.)
Sign up to receive new product announcements, special offers, and the annual product catalog. delivering excellent accuracy.
barrel is a law unto itself and there are
OTM load from Colt AR-15s with 20, 16 and 14.5 barrels. For comparison, I randomly
cartridges, the primers were seated exactly 0.004 below
from every rifle. I performed an accuracy (technically, precision) evaluation of
demonstrate the capability of the barrel. All shooting was conducted from a concrete bench-rest from a
The test vehicle for this evaluation was a semi-automatic
grains and a standard deviation of 0.44 grains. ammunition with two other factory loads and one of my match-grade
runout and is usually measured in thousandths of an inch when
One of the things that really impressed me about the
the ASYM Precision 75 grain Tactical OTM ammunition following my usual
lengths and chambers in common usage.
involved in loading ammunition can have on muzzle velocity. maximum variation of minus 0.002.
example, its not uncommon for Sierra 77 grain MatchKings to have
match bullets are produced with the jackets drawn from the base to the
There are a variety of instruments available for measuring the
inch. loaded cartridge as well as the consistency produced from the recipe
statistically significant difference in the readings, the chronograph
For eight of the ten
AR-15 with a 24 stainless steel Krieger barrel.
The cartridge’s propellant technology is custom designed to enhance weapon operation, and delivers phenomenal temperature stability.
protocol.
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