For those of you who might be interested in a comparison of these shells but haven't been following the "Remington Gun Club Question" tread on the Trap forum, I though I would post my findings here.
Remington Gun Club vs STS vs Nitro 27
After purchasing two boxes of each load, five shells were sacrificed to examine the internal components and the other 45 shells of each were shot at the patterning board to evaluate their performance potential.
LOADS EVALUATED
12ga Remington Gun Club Target load with 1 1/8-ounce of #7 ½ lead shot at a listed 1,200 fps.
12ga Remington Premier STS Light Handicap load with 1 1/8-ounce of #7 ½ lead shot at 3 DE (1,200 fps).
12ga Remington Premier Nitro 27 Handicap load with 1 1/8-ounce of #7 ½ lead shot at a listed 1,235 fps.
INTERNAL COMPONENTS
Hulls
Gun Club / “One-Piece STS Hull”, lightly ribbed green hull, silver steel head.
STS / “Premier STS Body”, smooth metallic-green hull, brass head.
Nitro / “Premier Unibody “, smooth metallic-gold hull, brass head.
Primers
Gun Club / “Premier STS Primer Mix”, it looks like an R209P primer.
STS / “#209 Primer”, it looks like an R209P primer.
Nitro / “Premier R209P STS Primer”.
Powders
Gun Club / Medium-sized gray flakes (16.8 grains, + or - .45 grains).
STS / Medium-sized gray flakes with green flakes (17.4 grains, + or - .15 grains).
Nitro / “New Ball Powder”, fine ball powder (19.1 grains, + or - .15 grains).
Wads
Gun Club / “Power Piston” RXP style wad.
STS / FIG8S wad.
Nitro / TGT12S wad.
Lead Shot
Gun Club / “Hard Gun Club Shot”, #7 ½ ( 375 pellets / 485.5 grains).
STS / “High Antimony Hard Lead Shot”, #7 ½ (408 pellets / 492.2 grains).
Nitro / “High Antimony STS Magnum Shot”, #7 ½ (420 pellets / 503.1 grains).
When I weighed out 492.2 grains of shot (1 1/8-ounce) and then counted the pellets to establish the “true” 1 1/8-ounce pellet count by weight, the Gun Club’s came in at 380 pellets/1 1/8-ounce (492.0 grains), the STS’s came in at 408 pellets/1 1/8-ounce (exactly 492.2 grains), and the Nitro’s had 411 pellets/1 1/8-ounce (491.8 grains). It would appear from the true pellet count that the pellets in the Gun Club’s are of a lower antimony content than the STS’s and Nitro’s. This would account for some of the lower pellet count in the Gun Club’s payload. The STS’s and Nitro’s must be very similar in antimony content since their true pellet count numbers were very close. Knowing that pellet size also influences pellet counts, I checked the diameter on 10 pellets from each load to get an average pellet size and all were within + or - .005" of the expected .095" diameter for #7 ½ lead shot.
PATTERNING PERFORMANCE
Of course, what matters most is how they perform so here are some pattern numbers from a 12-gauge Browning Citori w/ 28" Invector-Plus barrels and Briley flush chokes to allow for performance comparisons (patterns average of five, 30" post-shot scribed circle, yardage taped muzzle to target, and in-shell pellet count average of five).
40 YARDS / LM
Gun Club / 216 (58%)
STS / 277 (68%)
Nitro / 267 (64%)
40 YARDS / M
Gun Club / 236 (63%)
STS / 293 (72%)
Nitro / 302 (72%)
40 YARDS / IM
Gun Club / 260 (69%)
STS / 295 (72%)
Nitro / 307 (73%)
40 YARDS / LF
Gun Club / 263 (70%)
STS / 313 (77%)
Nitro / 309 (74%)
40 YARDS / F
Gun Club / 272 (73%)
STS / 321 (79%)
Nitro / 321 (76%)
As far as the GCs are concened, they just could not keep up with either the STSs or the Nitros when it came to putting pellets in the pattern at 40 yards with any of my chokes. Heck, the GCs with the full choke could only get close to the LM choke performance of the STSs and Nitros. The GCs did however perform up to factory standards for the choke, i.e., + or - 5% for F / 70%, IM / 65%, M / 60%, etc.
The STSs and Nitros were pretty much a dead heat, there just isn't enough difference between the STS and Nitro raw pattern numbers to worry about. Through the LM and LF chokes the STS load put a few more pellets in the patterns, through the M and IM chokes the Nitros put a few more pellets inside the pattern, and with the F choke they both had the exact same average pattern number.
The STSs were a little more efficient than the Nitros since they did this with fewer in-shell pellets which resulted in generally higher pattern percentages. The LM, LF and F chokes all registered a little higher pattern percentage with the STSs than the Nitros, they both had the same pattern percentage with the M choke, and the Nitros were one percent better with the IM.
So, unless you just like or want the Nitros gold hulls for reloading the STS load is providing the same level of patterning performance in my gun anyway.
Well, there you have it. A straight-up apples-to-apples comparison of the three loads. Remember, I'm just the messenger so you can be the judge.
Good luck.