I wasn't sure if the sub gauge or bird hunting forum was the best fit for this info, but since I will be using these for rail shooting; I thought this was the most appropriate forum. I also don't figure many will be using a .410 with steel since payloads and pellets counts are pretty low, but thought some might be interested in what I found. I'll mostly use these in my .410 SxS for rail shooting since it is generally a close range (inside 20 yards) affair.
.410 3” Federal Steel Game & Target load
3/8 oz #7 steel (156 pellets) @ 1400 fps
Pattern results @ 25 yards from a Yildiz .410 SxS with 28" barrels and factory flush choke tubes (patterns average of five, 20” & 30" post-shot scribed circles, yardage taped muzzle to target, in-shell pellet count average of five, and choke constriction from bore gauge).
PELLETS/SHELL (3/8 ounce = 164.1 gr)Count / weight (grains)
157 / 165.2 gr
156 / 164.5 gr
156 / 164.2 gr
155 / 162.8 gr
154 / 163.3 gr
Mean 155.6 / 164.0 gr
25 YARD PATTERNS
IC choke, right barrel, .005” constriction20” circle (%) / 20”-30” ring count / 30” pattern total (%)
122 / 30 / 152
107 / 41 / 148
107 / 37 / 144
102 / 46 / 148
100 / 45 / 145
Mean 107.6 (69.2%) / 39.8 / 147.4 (94.7%)
25 YARD PATTERNS
Mod. choke, left barrel, .010” constriction20” circle (%) / 20”-30” ring count / 30” pattern total (%)
131 / 18 / 149
127 / 20 / 147
117 / 28 / 145
110 / 35 / 145
104 / 35 / 139
Mean 117.8 (75.7%) / 27.2 / 145.0 (93.2%)
Good luck!