TM
PATENT PENDING

Patterns & Velocity

THE PROOF IS IN THE PATTERNS

If you want to see some of the real results of our tests, take a look at some of the actual patterns shot!!



The patterns and velocity achieved with Chamber MatesÔ is on average as good and many times better than what can be achieved when firing the same smaller gauge shell thru a standard shotgun or full length barrel tube of a matching gauge.

For our tests, we patterned smaller gauge shells thru 10, 12, 16, 20, and 28 gauge guns using sub gauge inserts and then patterned the same shells thru actual small gauge guns for use as a comparison. We used more than a dozen different guns and 6 different brands of quality target load shells. Every shot fired was also chronographed to check velocity.


12 Gauge Gun - 20 ga insert
30 yds - 7/8 oz. #8 Shot - IC Choke
1185 fps - 81% pellet count 30 in. circle

The patterns were analyzed by drawing both a 20 inch and a 30 inch circle centered around the densest area of the pattern. Every pellet hole was counted within both the 20 inch core and the outer 5 inch annular ring to get the total pellet count within the 30 inch circle. This told us the total percent of the load that hit within  the 30 inch circle, the total percent of the load that hit within the 20 inch core, and the total percent of the load that hit in the outer 5 inch annular ring.

We cut open 5 of each type of shell we were using and counted the actual number of pellets to get the true average number of pellets in a given load and used that number as a basis for determining the actual percentages of the load that hit within the circles. 

We could have achieved false higher percentages if we had stuck with what has previously been published as the number of pellets of a given size that are supposed to be in a load of a certain weight. We found for instance that there can be upwards of 50 more pellets in a 3/4 oz. load of #9 shot than the published data say there is. We think that this is due to the fact that lead shot with higher antimony percentages, such as are found in quality target loads, are lighter in weight thereby adding more pellets to a given load.

20 Gauge Gun - .410 ga insert
20 yds - 1/2 oz. #9 Shot - Skeet Choke
1215 fps - 77% pellet count 30 in. circle

12 Gauge Gun - 28 ga insert
20 yds - 3/4 oz. #9 Shot - IC Choke
1230 fps - 85% pellet count 30 in. circle

Patterns were shot and chronographed thru all of the different gauges of inserts and all of the different gauges of actual small gauge guns at distances of 20, 30, and 40 yards. At 20 yards, # 8 and #9 shot were fired using skeet, improved cylinder and modified chokes. Full choke was also used at 20 yards for the .410. At 30 yards, #9 and #8,  shot were fired using improved cylinder, modified, and full chokes, and at 40 yards, #8 and # 71/2 shot were fired using modified and full chokes. We did not bother doing any further testing of the .410 at 40 yards after the first few shots thru both sub gauge inserts and real small gauge guns revealed them useless at that distance.
As should be expected, the pattern percentages and velocities can vary one way or the other dependent upon the gun/load/choke combination being used. We are talking about both the sub gauge inserts and real small gauge guns here. The same exact shell could differ up to 50fps when shot thru 2 different guns using the same choke constriction and the pattern percentages produced could vary up to 10% or more. The same things can happen when shooting 2 different brands of shells out of the same gun using the same choke constriction.

These facts makes it impossible for us to tell you exactly what velocity and pattern percentage you should expect to get when shooting a 28 gauge load of #9s thru a 12 gauge gun at 20 yards using a skeet choke. What we can tell you is that you can expect to get as good or even better results with that combination than you can when shooting a 28 gauge load of #9s thru a real 28 gauge gun at 20 yards using a skeet choke. You should always pattern your gun to see which choke/load combination works best in your gun.

The bottom line is that the patterns and velocity achieved when firing the smaller gauge shells thru the larger gauge guns is on average as good and many times better than what can be achieved when firing the same smaller gauge shell thru a real smaller gauge gun.


THE PROOF IS IN THE PATTERNS

If you want to see some of the real results of our tests, take a look at some of the actual patterns shot!!



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