Painless load development (mine)

waspocrew

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Apr 2, 2022
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Tried this out with my 338 RUM and the 250 Norma GTX the other day. Checked for pressure since it wasn't a published combo and loaded where I thought I was safe. 5 shots at 100 yards and adjusted the scope. Moved to the 300 yard steel (furthest my local range has) and was stacking shots on top of each other.

I'll verify with 10 shots at further distance, but I think this combo is going to work. For reference, that's a 1" square on the target.

IMG_5663.jpeg
 
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Joined
Mar 16, 2021
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Western Iowa
Tried this out with my 338 RUM and the 250 Norma GTX the other day. Checked for pressure since it wasn't a published combo and loaded where I thought I was safe. 5 shots at 100 yards and adjusted the scope. Moved to the 300 yard steel (furthest my local range has) and was stacking shots on top of each other.

I'll verify with 10 shots at further distance, but I think this combo is going to work. For reference, that's a 1" square on the target.

View attachment 805051
That's a pretty spectacular group from hammer of a load. Well done!
 

Harvey_NW

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Feb 13, 2019
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WA
Tried this out with my 338 RUM and the 250 Norma GTX the other day. Checked for pressure since it wasn't a published combo and loaded where I thought I was safe. 5 shots at 100 yards and adjusted the scope. Moved to the 300 yard steel (furthest my local range has) and was stacking shots on top of each other.

I'll verify with 10 shots at further distance, but I think this combo is going to work. For reference, that's a 1" square on the target.

View attachment 805051
It's funny how traditional ideology would have you trying to excuse that 1 as a "flyer", or "pulled", etc. I look at that group now and think as long as you keep breaking shots clean like that, that's probably just gonna fill in and be a damn fine load. Especially out of a 338 RUM! Lol.
 

huntnful

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Oct 10, 2020
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It's funny how traditional ideology would have you trying to excuse that 1 as a "flyer", or "pulled", etc. I look at that group now and think as long as you keep breaking shots clean like that, that's probably just gonna fill in and be a damn fine load. Especially out of a 338 RUM! Lol.
So true. I still call them “flyers” but don’t excuse them as such anymore. It’s just the group and how that gun shoots with that particular combo.

IMG_8007.jpeg
 

Harvey_NW

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Feb 13, 2019
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WA
So true. I still call them “flyers” but don’t excuse them as such anymore. It’s just the group and how that gun shoots with that particular combo.

View attachment 805318
F***in fliers! 🤬:LOL: 9 shots into like .4" and one just had to shit the bed. I honestly think that may have been a bedding thing, as this was from a Tikka action in an unbedded and undertorqued factory stock and being shot bare muzzle. But yeah, still part of the group!
20230219_164616.jpg
 

waspocrew

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MT
It's funny how traditional ideology would have you trying to excuse that 1 as a "flyer", or "pulled", etc. I look at that group now and think as long as you keep breaking shots clean like that, that's probably just gonna fill in and be a damn fine load. Especially out of a 338 RUM! Lol.
Thanks! I agree, in the past I probably would be trying to explain that away. It just is what it is. I’m excited to stretch this out on steel next week to see how it does.
 
Joined
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Here’s another one. New 22 creedmoor barrel. I did have to switch powders. It did not like RL26…1.7” or so not quite what I wanted.

Made a powder swap, work up to pressure, back down a grain, and two confirmation groups.

087E8F8B-C1E5-466B-8F20-E6559FA9B08C.jpegC898AEC4-370F-4681-AD7C-BC06C31519E0.jpeg


Just before that barrel I got a new 6cm going. It did not really like the first bullet I tried (106 tap). Tried two powders with mediocre results.

Swapped to 109eld, worked up to pressure with RL16, backed off, and done.

Sometimes you need to try a few combos of powders and or bullets..other than that no tinkering needed.D663DFD6-08BF-4E34-B19D-0B4F67939009.jpeg
 

Juan_ID

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Feb 25, 2012
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Idaho
I don’t think I’ve posted a 10 shot group from my GT, same load I posted the 5 shot group at 600 yards a few pages back. Once I switched to the 80 eld, I dropped a max charge and seated bullet to 2.50” oal and shot. This was not the first 10 shot group with the rifle but the only one I can find at the moment. Over 900 rounds in it is still shooting good, recently had it cut to 16.5” to see what velocities were like there. Thinking next barrel will be 18”
80 eldm
36.2gr H4350
Alpha brass
cci 450
image_cropper_0D3E1BFF-FFC1-435B-977C-57B14ABDA367-73669-00000C713584D89E.jpeg
 
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