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Joined: Feb 2002
Posts: 46,095 Likes: 240
Freak of Nature
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Freak of Nature
Joined: Feb 2002
Posts: 46,095 Likes: 240 |
Anybody use IMR 4227 for 300BO subsonic? I have everything for loading some 220gr subs and just wondered if anybody else uses it.
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Joined: Oct 2022
Posts: 4,110 Likes: 76
Management Spike
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Management Spike
Joined: Oct 2022
Posts: 4,110 Likes: 76 |
No, but it would probably do well. I like H110.
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Joined: Sep 2025
Posts: 48
spike
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spike
Joined: Sep 2025
Posts: 48 |
I use h110 and cfe blk with good results with 190’s
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Joined: Feb 2002
Posts: 46,095 Likes: 240
Freak of Nature
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Freak of Nature
Joined: Feb 2002
Posts: 46,095 Likes: 240 |
I have H110 as well. Both are my .44mag powders. In my research I've read that 4227 burns a bit cleaner that H110. Gonna give it a try.
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Joined: Oct 2022
Posts: 4,110 Likes: 76
Management Spike
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Management Spike
Joined: Oct 2022
Posts: 4,110 Likes: 76 |
My subsonic load (16" barrel) uses a 190 Sub-X over 8.7 grains of H110. Quiet and accurate. Let us know how the IMR4227 works out. I've always loved the stuff.
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Joined: Dec 2018
Posts: 1,172 Likes: 13
6 point
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6 point
Joined: Dec 2018
Posts: 1,172 Likes: 13 |
You can likely come up with a sub load for IMR 4227, but it’s not ideal. H110 is even worse. They both work great for supers though. 1680 is still the gold standard for subs, IMO. Lil gun, CFE Blk also work well
Edit to add, this is assuming heavy bullets in the 220-245 grain range. Things may be different if you’re loading lightweight subs
Last edited by thayerp81; 08/27/26 10:47 PM.
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Joined: Feb 2002
Posts: 46,095 Likes: 240
Freak of Nature
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Freak of Nature
Joined: Feb 2002
Posts: 46,095 Likes: 240 |
You can likely come up with a sub load for IMR 4227, but it’s not ideal. H110 is even worse. They both work great for supers though. 1680 is still the gold standard for subs, IMO. Lil gun, CFE Blk also work well
Edit to add, this is assuming heavy bullets in the 220-245 grain range. Things may be different if you’re loading lightweight subs There's actually a good bit of load data for 4227 subs, even on the Hodgdon website
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Joined: Oct 2022
Posts: 4,110 Likes: 76
Management Spike
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Management Spike
Joined: Oct 2022
Posts: 4,110 Likes: 76 |
You can likely come up with a sub load for IMR 4227, but it’s not ideal. H110 is even worse. Why is that? I've shot my H110 load alongside factory Hornady Subsonic and can't tell any difference in sound. Loaded some rounds with AA2200 at an identical velocity (1060) and they are much louder and dirtier. The H110 load is also accurate and functions in my AR. A few weeks back we were shooting an 8" steel plate with it at 200 yards with it. Interestingly, there's a holdover mark in my scope that was on at that range, though I never plan to shoot that far on game.
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Joined: Dec 2018
Posts: 1,172 Likes: 13
6 point
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6 point
Joined: Dec 2018
Posts: 1,172 Likes: 13 |
4227 and h110 can (and obviously) do work in some instances, and they might be better for the lighter weight subs. I cut my teeth on 300B0 in the early days of introduction when pretty much all subs were 220 SMK’s or 225 Hornady BTHP and everyone was still trying to figure out the best, quietest, most reliable setups in gas guns. Everyone (including manufacturers ) were experimenting with gas port size, gas system length and barrel length. Through all of that, the load was quietest and would cycle in almost anything was one of the 220+ bullets under AA1680. During the sane time, h110 was gold standard for supersonic loads.
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