Thought this may be of interest to some...
Anyone want to buy some N140 and CFE223?
Anyone want to buy some N140 and CFE223?
11 powders tested for temperature stability in 308 Win
- Thread starter User00040
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Thanks, very handy!
Interesting.
But TBH, my first thought was "Why are they using CFE223 in a .308?"
Which then leads to my next thought "While this is great for establishing the powders behaviors in a .308, does it really speak for the powders behaviors across cases with different case volumes?"
Just thinking out loud here...before everyone start selling their powders because of a test (granted, pretty thoroughly done) that was done in a different cartridge than what they may shooting themselves...
But TBH, my first thought was "Why are they using CFE223 in a .308?"
Which then leads to my next thought "While this is great for establishing the powders behaviors in a .308, does it really speak for the powders behaviors across cases with different case volumes?"
Just thinking out loud here...before everyone start selling their powders because of a test (granted, pretty thoroughly done) that was done in a different cartridge than what they may shooting themselves...
That’s good as I have 8 tubs of it
Somebody from the highlands worried about N140 between 19c and 36c
Temps from -10°c this winter to +30°c last summer...
Am I reading this right, the actual volume as a % of max seem to be one of the determining factors, with full cases showing better results. ?
Which might be conformation bias, but I was always told when choosing powders, it should also be factored in that a full case was desirable . ( so a full N150 better than 96% of n140 , and not forgetting burn rates, bullet weight, and case dimensions etc )
Which might be conformation bias, but I was always told when choosing powders, it should also be factored in that a full case was desirable . ( so a full N150 better than 96% of n140 , and not forgetting burn rates, bullet weight, and case dimensions etc )
Its totally wasted on deer!That’s good as I have 8 tubs of it
If you arent crunching the powder as you seat there isnt enough powder.
I’m planning on 155 gr .308 target loads and 123 gr creedmoor loads, though not too excited about the case fill in the creedmoor.
Have managed 4074 fps with a 35 gr out of the .223 AI too but that probably is a bit of a waste. Fun way to fire form brass though!
Apparently it’s pretty good in 45-70 which is on my to do list, so not at the mo, but if I change my mind I’ll give you a shout
LeftHandGuy
Well-Known Member
Very interesting, but I am surprised that the author makes no reference to what POI shift was caused (if any) or if any of the cases showed signs of over/under pressure.
I would have thought that those would be the two prime effects a hunter or marksman would be interested in.
I would have thought that those would be the two prime effects a hunter or marksman would be interested in.
ChesterP
Well-Known Member
Exactly what I have found with Vhit N140. Later batches are meant to be less temperature sensitive (the "new" version with 308 (different stabilising/anti copper fouling additive which I have yet to try)). RS50 on the other hand proved in a direct comparison between 12 degrees and 30 degrees to be more linear and predictable than my older batch of N140 which curved upwards rather sharply between 20 and 30 degrees C, sending my usual 44gr load behind a 155gr SMK over pressure.
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