Todays groupr test. 300WM LRAB 190gr FAIL

Kelly Timoffee said:
The 338 is plenty far enough , that was my initial ladder with the new barrel many years ago.Just putting that up as an example of a ladder test that went well.

I’m less concerned about velocity at this point and more concerned about nodes , if I see a node that is shooting Sub MOA with varying charge weights then I’d say there is something to pursue.

I take the chronograph as an extra tool.Like with this test , it’s shows an overall picture , with the retumbo it shows to me that over all speed is comparably slow for the chambering and with the 7828 that at the top end of the charge weights it’s becoming inconsistent.It will also show me if it may be time to stop at a particular charge weight if I see velocities getting too high or erratic.I’ll place more relevance on the velocities once I start doing group tests and can determine deviations.
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I was meaning distance to the target for the test, sorry for the confusion.
 
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Okay, here is the plan...

IMR - 73
IMR - 74.5

As they both appear to be the center of a node.

RT - 75.5
RT - 77.4

As they too kind of appear to be in the middle.

RT - 78.5

Due to Dave suggesting that the Retumbo doesn't mind being compressed a bit to see what we get.

2 x 3 shot groups of each on same target?
 
Well, I will concede this time, the rifle, with a benchmark barrel, does not like the LRAB's.Time to move along.

Today's range report at 100 yards, no good , piss poor, downright awful.







I also have had just about enough of my chronograph as well.
 
I use a chrony as well. I have my placement of it down pat and very rarely get an error BUT. I was at the range last week with a buddy who has a magneto speed. I had 1 shot left of 3 different charges so we hooked up is magneto speed to my rifle and fired the last 3 shots through the chrony as well. Every shot my chrony was registering 25-30'/sec faster and it is 12' from the muzzle. Dam!! While mine seems to always work, if it is off that far I am done with it too. This is of course assuming the magneto speed is right.
 
todbartell said:
Retumbo looks like it will work in the 2850 fps range

Try a faster burn rate like RL22, H4831, IMR 4955, RL19, RL23, Ramshot Hunter, StaBALL 6.5, Viht N560
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I agree. Ran a swack of pounders in my old 300wm rl22 was best accuracy and speed. 190 at 3100 feet per second sub one in groups on a good day out to a thousand yards. Slowly work my loads up to 80 grains was still no pressure signs on a cold day, would probably be a bomb an a hot day. But settled on the low 70s for best accuracy.
 
Well more fail............

Switched to game kings 180gr , with H1000 , did a ladder test also used 7828.

This is the H1000 target at 250, I didn't even bother with writing the charge weights on for you all to see..........



The 7828 I quit after 4 shots.

I checked my scale , I'll post those findings on a new thread, could be the culprit.

I'm thinking that is enough reloading for this season! :mad:
 
Just curious did you ever consider IMR 4831? I work with a bunch of guys that use it for 300WM and like it? I'm doing my ladder test next week with it, and 180 Bergers, then 178 ELD-X?
 
It would be interesting to see 2 ladder test with the same loads shot one after the other...I'm betting the result of each will not match.
 
mildot said:
Just curious did you ever consider IMR 4831? I work with a bunch of guys that use it for 300WM and like it? I'm doing my ladder test next week with it, and 180 Bergers, then 178 ELD-X?
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I was going to get some RL 17,19 and 22, as well as the 4831, but where does one stop? There is no consistency on any of the powders I am used RT, H-1000 , 7828.If I can get any resemblance of any accuracy I think I have to break this back down to the wood and start right from the beginning.Those three powders should of done something even close to acceptable.


I think I'm going to call it quits for now.
 
Kelly Timoffee said:
I was going to get some RL 17,19 and 22, as well as the 4831, but where does one stop? There is no consistency on any of the powders I am used RT, H-1000 , 7828.If I can get any resemblance of any accuracy I think I have to break this back down to the wood and start right from the beginning.Those three powders should of done something even close to acceptable.


I think I'm going to call it quits for now.
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Once I get my results and they are favorable, I see your a neighbor, I'd be more than happy to send you some to try, no worries.
 
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