Bearded Phil
Member
Hi Everyone. My name is Phil and I've been reading these forums for a while and finally decided to join. And what better way to start out than with a range report? I've seen some others asking about IMR 4227 in 45-70 Gov't and I thought I'd share some of my findings as I recently got 8 Lbs and have been testing loads.
The set-up:
Henry H010G- 18.43" barrel
Skinner Alaskan peep sights with .096" standard aperture. Patridge blade front sight.
SNS 405gr Coated RNFP
Star Brass
CCI LRP
COL- 2.515"-2.52" (some brass has different trim lengths)
Caldwell Precision Chrono- ~12-14 LF from bench
Sand filled lead-shot bag front rest, no rear bag
50 YD range on NRA TQ-4 targets
And of course IMR 4227 powder.
I tried to let my barrel cool after each 5rd set for about 5 mins at least.
Now, I loaded a ladder of 4 different charges, 5 rounds each for boxes of 20 rounds total. I did this twice with the ladder charges and then loaded full 20 round boxes of the top 3 charges.
Load data was extrapolated from Lyman's Cast Handbook 3rd edition from their 420gr #457193 bullet (Winchester & Marlin data).
One other quick thing up top about group sizes... they're not great, haha. I'm still working on my technique so the room for improvement is visible here. The sizings are measures of the actual spread on each 5 round set, no removing outliers/flyers. I only mention it so that if anyone wants to extrapolate what a decent charge is here they don't look at my 5" groups and write them off. I'm sure most of these are much more accurate than my skills.
Personally I think I'm finding after my full 20 round set of 22.7gr charges that I shoot better at lower recoil charges (not that any of these are particularly hot, mind you). For my Set #1 & #2 at that charge I was having pretty good results. Set #3 my excitement let my focus falter (it is what the numbers say) and #4 a flyer ruined that set but hey, no cheating!
There's a lot of data below, I hope someone can get something useful out of it. If anyone does I plan to do similar testing with IMR 4227 in 357 Mag with 158gr LCRN and 158gr HDY XTP from my Henry H012GM and would be glad to share. Thanks for looking!
_________________________
-LADDER #1
21.0gr
~ 1017 FPS
SD: 18.61
ES: 50
GROUP: 4.00"
22.7gr
~ 1076 FPS
SD: 10.04
ES: 24
GROUP: 3.00"
24.4gr
~ 1158 FPS
SD: 11.69
ES: 29
GROUP: 4.19"
26.2gr
~ 1228 FPS
SD: 10.43
ES: 25
GROUP: 5.75"
_________________________
LADDER #2
21.0gr
~ 999 FPS
SD: 22.74
ES: 61
GROUP: 5.38"
22.7gr
~ 1074 FPS
SD: 9.31
ES: 23
GROUP: 2.88"
24.4gr
~ 1145 FPS
SD: 18.99
ES: 46
GROUP: 2.68"
26.2gr
~ 1230 FPS
SD: 10.02
ES: 20
GROUP: 3.25"
________________________
20 ROUNDS @ 26.2gr (4 EA- 5 round sets)
Set 1
~ 1224 FPS
SD: 9.14
ES: 23
GROUP: 4.00"
Set 2
~ 1238 FPS
SD: 15.74
ES: 42
GROUP: 4.19"
Set 3
~ 1226 FPS
SD: 10.07
ES: 24
GROUP: 5.88"
Set 4
~ 1232 FPS
SD: 11.44
ES: 25
GROUP: 4.50"
Aggregate:
~ 1230 FPS
SD: 11.99
ES: 49
GROUP: 4.64"
_________________________
20 ROUNDS @ 24.4gr (4 EA- 5 round sets)
Set 1
~ 1138 FPS
SD: 15.66
ES: 35
GROUP: 4.25"
Set 2
~ 1135 FPS
SD: 8.41
ES: 23
GROUP: 4.75"
Set 3
~ 1140 fps
SD: 18.99
ES: 52
GROUP: 3.63"
Set 4
~ 1143 FPS
SD: 13.52
ES: 28
GROUP: 5.75"
Aggregate
~ 1139
SD: 13.45
ES: 52
GROUP: 4.60"
_______________________
20 ROUNDS @ 22.7gr (4 EA- 5 round sets)
Set 1
~ 1077 FPS
SD: 24.14
ES: 60
GROUP: 1.31"
Set 2
~ 1078 FPS
SD: 17.67
ES: 43
GROUP: 1.38"
Set 3
~ 1077 fps
SD: 13.92
ES: 27
GROUP: 5.13"
Set 4 (Special Note: I forgot to start recording and missed the first 3 rounds on this set)
~ 1088 FPS
SD: 9.19
ES: 13
GROUP: 2.94"
Aggregate (of the 17 recorded rounds)
~ 1079 FPS
SD: 16.53
ES: 60
GROUP: 2.69"
__________________________
The set-up:
Henry H010G- 18.43" barrel
Skinner Alaskan peep sights with .096" standard aperture. Patridge blade front sight.
SNS 405gr Coated RNFP
Star Brass
CCI LRP
COL- 2.515"-2.52" (some brass has different trim lengths)
Caldwell Precision Chrono- ~12-14 LF from bench
Sand filled lead-shot bag front rest, no rear bag
50 YD range on NRA TQ-4 targets
And of course IMR 4227 powder.
I tried to let my barrel cool after each 5rd set for about 5 mins at least.
Now, I loaded a ladder of 4 different charges, 5 rounds each for boxes of 20 rounds total. I did this twice with the ladder charges and then loaded full 20 round boxes of the top 3 charges.
Load data was extrapolated from Lyman's Cast Handbook 3rd edition from their 420gr #457193 bullet (Winchester & Marlin data).
One other quick thing up top about group sizes... they're not great, haha. I'm still working on my technique so the room for improvement is visible here. The sizings are measures of the actual spread on each 5 round set, no removing outliers/flyers. I only mention it so that if anyone wants to extrapolate what a decent charge is here they don't look at my 5" groups and write them off. I'm sure most of these are much more accurate than my skills.
Personally I think I'm finding after my full 20 round set of 22.7gr charges that I shoot better at lower recoil charges (not that any of these are particularly hot, mind you). For my Set #1 & #2 at that charge I was having pretty good results. Set #3 my excitement let my focus falter (it is what the numbers say) and #4 a flyer ruined that set but hey, no cheating!
There's a lot of data below, I hope someone can get something useful out of it. If anyone does I plan to do similar testing with IMR 4227 in 357 Mag with 158gr LCRN and 158gr HDY XTP from my Henry H012GM and would be glad to share. Thanks for looking!
_________________________
-LADDER #1
21.0gr
~ 1017 FPS
SD: 18.61
ES: 50
GROUP: 4.00"
22.7gr
~ 1076 FPS
SD: 10.04
ES: 24
GROUP: 3.00"
24.4gr
~ 1158 FPS
SD: 11.69
ES: 29
GROUP: 4.19"
26.2gr
~ 1228 FPS
SD: 10.43
ES: 25
GROUP: 5.75"
_________________________
LADDER #2
21.0gr
~ 999 FPS
SD: 22.74
ES: 61
GROUP: 5.38"
22.7gr
~ 1074 FPS
SD: 9.31
ES: 23
GROUP: 2.88"
24.4gr
~ 1145 FPS
SD: 18.99
ES: 46
GROUP: 2.68"
26.2gr
~ 1230 FPS
SD: 10.02
ES: 20
GROUP: 3.25"
________________________
20 ROUNDS @ 26.2gr (4 EA- 5 round sets)
Set 1
~ 1224 FPS
SD: 9.14
ES: 23
GROUP: 4.00"
Set 2
~ 1238 FPS
SD: 15.74
ES: 42
GROUP: 4.19"
Set 3
~ 1226 FPS
SD: 10.07
ES: 24
GROUP: 5.88"
Set 4
~ 1232 FPS
SD: 11.44
ES: 25
GROUP: 4.50"
Aggregate:
~ 1230 FPS
SD: 11.99
ES: 49
GROUP: 4.64"
_________________________
20 ROUNDS @ 24.4gr (4 EA- 5 round sets)
Set 1
~ 1138 FPS
SD: 15.66
ES: 35
GROUP: 4.25"
Set 2
~ 1135 FPS
SD: 8.41
ES: 23
GROUP: 4.75"
Set 3
~ 1140 fps
SD: 18.99
ES: 52
GROUP: 3.63"
Set 4
~ 1143 FPS
SD: 13.52
ES: 28
GROUP: 5.75"
Aggregate
~ 1139
SD: 13.45
ES: 52
GROUP: 4.60"
_______________________
20 ROUNDS @ 22.7gr (4 EA- 5 round sets)
Set 1
~ 1077 FPS
SD: 24.14
ES: 60
GROUP: 1.31"
Set 2
~ 1078 FPS
SD: 17.67
ES: 43
GROUP: 1.38"
Set 3
~ 1077 fps
SD: 13.92
ES: 27
GROUP: 5.13"
Set 4 (Special Note: I forgot to start recording and missed the first 3 rounds on this set)
~ 1088 FPS
SD: 9.19
ES: 13
GROUP: 2.94"
Aggregate (of the 17 recorded rounds)
~ 1079 FPS
SD: 16.53
ES: 60
GROUP: 2.69"
__________________________
Last edited: