What Gives?!

jnewing

jnewing

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Ok I have a general question here, I've only been reloading for about 2 years, and one of my 6.5 rifles I've been loading at 37.2gr of H4350 pushing a 140gr bullet, now it seems I see a fair number of people about 10 or more that I've read they are loading 42gr some even more than this of H4350 pushing the same 140gr bullet? Everywhere I've read, every single loading book / data I've found says to never exceed 40gn of H4350?!

Is this a common thing? to just throw max load data into the wind?! and I missing something, is this specific to this 6.5 load??! Am I just being way to cautious?
 
If you are talking 6.5 x 55, there are a lot of older rifles such as the Krag Jorgenson that are not particularly strong. Reloading data recognizes that fact. However, in a good, strong model 96, some will exceed the published max loads with no issues.
That said, the published max loads can be to high for some rifles, you need to approach them with due caution, watching for pressure signs.
 
jnewing said:
Sorry 6.5 creedmoor
Click to expand...

Nosler says 41 grains max. Keep in mind that the Creedmoor is used by a lot of target shooters that push the limits of pressure because the case capacity is relatively small.

6-5-Creedmoor-140gr.jpg
 
Very long bullets. A slight change in barrel or throat can make a big difference in pressure one rifle to the next. Max in his rifle might be a bomb in yours. Or vice versa. Start low and work up.
 
jnewing said:
Ok I have a general question here, I've only been reloading for about 2 years, and one of my 6.5 rifles I've been loading at 37.2gr of H4350 pushing a 140gr bullet, now it seems I see a fair number of people about 10 or more that I've read they are loading 42gr some even more than this of H4350 pushing the same 140gr bullet? Everywhere I've read, every single loading book / data I've found says to never exceed 40gn of H4350?!

Is this a common thing? to just throw max load data into the wind?! and I missing something, is this specific to this 6.5 load??! Am I just being way to cautious?
Click to expand...

Hornady manual lists 40.9 of H4350 as max with 140 grain bullet

Hodgdon's lists 40.0 of H4350 as max with 140 grain bullet

Shooting And Loading The Hornady 6.5 Creedmoor
https://www.americanrifleman.org/Webcontent/pdf/2009-6/200961145351-hornadycreedmoor.pdf

"For the 140-gr. A-MAX, they are 41.9 grs. of H4350, a Fed. 210M primer and 2.800" OAL for a muzzle velocity of 2820 f.p.s."

NOTE, Nosler case capacity 46.8, and above link lists case capacity as 52.1 with *new unfired brass so just the brands of brass will effect max load data and chamber pressure.
Example, when using military 7.62 brass it is recommended to reduce the load data for the .308 by 2 grains because of the lower case capacity of 7.62 brass.
*Normally case capacity is measured with a case "fired" in your chamber and not new unfired brass.

Loading data will vary between rifles and the components used and the method used to measure chamber pressure. Meaning all load data is "ball park" information.
 
Thanks guys I really appreciate this. I think once I get my new barrel put on I'm going to try bumping up my current load in small increments, what are some signs of pressure that I should be looking for as to know when to stop?
 
jnewing said:
Thanks guys I really appreciate this. I think once I get my new barrel put on I'm going to try bumping up my current load in small increments, what are some signs of pressure that I should be looking for as to know when to stop?
Click to expand...
As suggested already no two rifles will really be identical (I don't own 2 the same!), but more importantly what other people are willing to do to/with their own rifles won't be the same either...Stick with a manual over th'internet, and [never ever stated before] work up.

http://www.hodgdonreloading.com/rel...-trick-monitoring-pressure-your-rifle-reloads
 
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