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RL-17 vs H4350 and temperature variance

 
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  #15  
Old 01-25-2013, 07:03 PM
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Re: RL-17 vs H4350 and temperature variance

No need to get madd ive shot alot of rounds.. and never seen 100 fps with the powders i use.. was just my 2 cents lol cry somewhere else
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  #16  
Old 01-25-2013, 07:57 PM
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Re: RL-17 vs H4350 and temperature variance

Quote:
Originally Posted by Lefty7mmstw View Post
I've seen 100 fps change with THE SAME BOX of 25 WSSM'S loaded with H4895;
YOU do not know what you are talking about. I shoot over an Oehler 35p chrono.
Can you prove that the whole 100 fps change was due to powder temp alone ? I think not.
Just because you experienced that kind of wide variation doe not mean H4895 is more temp sensitive than some other powder. Powder performance can vary due to burning rates and grain size and shape and the cartridge they are used in even if they are made with the same basic formula . Varget may well be a bit better than H4895 but I doubt it as they are very close in burning rate and aplication .
What I said is correct wether you like it or not .
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  #17  
Old 01-26-2013, 10:00 AM
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Re: RL-17 vs H4350 and temperature variance

Quote:
Originally Posted by Lefty7mmstw View Post
I've seen 100 fps change with THE SAME BOX of 25 WSSM'S loaded with H4895;
YOU do not know what you are talking about. I shoot over an Oehler 35p chrono.
My question is this. With your above statement about the 100 fps swing.....are we talking about a 100 FPS ES on the same day, or are we talking about a 100 FPS AV difference when shooting on two different days when the temps were way different?

Two TOTALY different things.
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  #18  
Old 01-26-2013, 01:40 PM
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Re: RL-17 vs H4350 and temperature variance

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Originally Posted by 4xforfun View Post
My question is this. With your above statement about the 100 fps swing.....are we talking about a 100 FPS ES on the same day, or are we talking about a 100 FPS AV difference when shooting on two different days when the temps were way different?

Two TOTALY different things.
Abuot three months apart. I about crapped myself when the oehler said 3150 fps avg. instead of the 3050 I was expecting. I never drank the Hodgdon kool-aid, but I did expect them to be better than that.
The load is 38.0 H 4985, win 25 wssm brass trimmed .010" under, fed 210, sierra 100 grain pro-hunter.
I usually shoot rl but was limited on their data at the time, so I started playing with H 4895 with 100's and h 4350 with 120's. I have really limited data on how the 4350 has done with the 120 speer and a 215 in that rifle, but I'd put $50 on it being under 30 fps between 20 and 80 degrees. I think H is still getting temp. swings with certain powders and you really have to try them out and not just believe.
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  #19  
Old 01-26-2013, 02:24 PM
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Re: RL-17 vs H4350 and temperature variance

Quote:
Originally Posted by Lefty7mmstw View Post
Abuot three months apart. I about crapped myself when the oehler said 3150 fps avg. instead of the 3050 I was expecting. I never drank the Hodgdon kool-aid, but I did expect them to be better than that.
The load is 38.0 H 4985, win 25 wssm brass trimmed .010" under, fed 210, sierra 100 grain pro-hunter.
I usually shoot rl but was limited on their data at the time, so I started playing with H 4895 with 100's and h 4350 with 120's. I have really limited data on how the 4350 has done with the 120 speer and a 215 in that rifle, but I'd put $50 on it being under 30 fps between 20 and 80 degrees. I think H is still getting temp. swings with certain powders and you really have to try them out and not just believe.

I am not a 4895 shooter. Is the 4895 listed as an "extream" powder? I know that Varget, Retumbo, and one or two others are listed as such, but I don't know about 4895.

I also read somewhere that RL17 is a different powder than RL15 and 19. I am not sure if it is a triple/double/single based thing or something else.
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  #20  
Old 01-26-2013, 03:20 PM
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Re: RL-17 vs H4350 and temperature variance

RL-17 is very temp sensitive in my 284 win 100fps 30deg-90deg, RL25 is ok in my 257 weatherby see only 40fps difference in temp swings. I have personally seen less variance in the H extreme powders. Try the cooler method and let everyone know what you find out!
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  #21  
Old 01-26-2013, 03:41 PM
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Re: RL-17 vs H4350 and temperature variance

I did the cooler method with h1000 this last summer.. put a temp gun on outside rounds and cooler rounds. Outside round were 94 degrees 5 shot string es of 7 average velocity 2790.. cooler rounds were 26 degrees es of 5 average was 2786.. 338 lapua mag
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