longdayjake
Member
Which powder you using?
First RMR Bullet Order
- Thread starter Doublehelix
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longdayjake
Member
Never mind. Saw it. For hp 38/win231 I have used as high as 5 grains. Haven't done much power pistol at all so I can't help you there.
ArchAngelCD
Member.
One of my loads with a 124/125gr FMJ bullet is 4.8gr W231/HP-38 but I have also gone to 5.0gr with no problems. I also used a longer OAL.
LiveLife
Member
Yes, load data is for thicker plated Berry's bullets but they are comparable to jacketed and I load Berry's HBRN-TP to full jacketed load data. I have used same load data with FMJ/JHP bullets with good results, at least for Titegroup and W231/HP-38.
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Doublehelix
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Mostly Titegroup actually.
LiveLife
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As I mentioned on post #20, you can try 4.0 gr of Titegroup at 1.135"-1.145" with RMR 124 gr FMJ but since barrels have different leade length, groove diameter, etc., I would suggest you conduct a powder work up. With only .5 gr range from start to max, you may only need to load 3.6/3.8/4.0 gr test rounds to give you accuracy trend to fine tune your load - https://www.thehighroad.org/index.php?threads/first-rmr-bullet-order.820845/#post-10541857
azrocks
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For what it's worth, I've been working with two different 124-grain FMJs (Armscor & Precision Delta) using Titegroup, and found with both I could go as low as 3.6g (the lowest powder charge I tested) while maintaining 100% reliability in 5 different unmodified handguns (including 2 subcompacts). Accuracy was sub-par below 3.8, however, and seemed to be best in the 4.1-4.2 range. I did, however, get the 3.9s to print pretty good groups by experimenting with OAL (1.133 worked best in a stock PPQ, while 1.142 worked best in a stock G19). Accuracy started to trail off at 4.3, which was the highest I went. I didn't test the little guns much, but in the context of accuracy, they were much less tolerant of lower charge weights than the 4" barrels.
I ended up settling at 4.2g with the aforementioned OALs, which produced good groups from all guns. .378 crimp, Win primers, federal brass, near sea level. No chrono so no clue there but at 4.2 they're still softer-shooting than two brands of 115g off-the-shelf plinking ammo (Federal & Magtech), and print better.
Back on topic - has anyone used both the RMR as well as Precision Delta FMJs, and if so, how do they compare in terms of consistency?
I ended up settling at 4.2g with the aforementioned OALs, which produced good groups from all guns. .378 crimp, Win primers, federal brass, near sea level. No chrono so no clue there but at 4.2 they're still softer-shooting than two brands of 115g off-the-shelf plinking ammo (Federal & Magtech), and print better.
Back on topic - has anyone used both the RMR as well as Precision Delta FMJs, and if so, how do they compare in terms of consistency?
LiveLife
Member
This is precisely the reason why I am doing myth busting comparison bullet threads at 25/50 yards - https://www.thehighroad.org/index.p...ng-at-25-50-yards.808446/page-2#post-10346110
I am currently working on plated bullet comparison but as many members requested, I am establishing a jacketed bullet reference base with 115/124 gr FMJ bullets. I have done extensive testing with RMR 115 gr FMJ along with preliminary comparison testing with Hornady HAP and Zero FMJ bullets. Since RMR started manufacturing 124 gr FMJ, I will be testing it thoroughly next.
Yes, as logical progression, jacketed bullets will be comparison tested also along with coated/lead bullets and I have started 9mm bullet sizing comparison thread and as Walkalong suggested, verified my dial/digital calipers with .355"/.400"/.451" +/- pin gages - https://www.thehighroad.org/index.p...re-sized-the-same.818806/page-2#post-10534024
Since Walkalong is logging bullet lengths for his load development/range tests, I will be adding bullet length to the threads as well.
In time, these myth busting comparison threads for each caliber will be combined into "mother of all" bullet comparison thread which I will likely pursue as I approach my retirement so stay tuned.
midland man
Member
I echo what he said!!You totally & absolutely rock. Thanks so much for taking the time and effort to do all this
LiveLife
Member
Thank you and stay tuned for future range reports.
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longdayjake
Member
I'm gonna have to agree. BDS is pretty amazing.
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