daniel craig
Member
- Joined
- Dec 23, 2009
- Messages
- 2,815
Ok good to know. So if I’m .18 below coal I should pull and redo?It is a guideline for replicating a load. Some powders can be compressed in the case by the bullet and some cannot. The COAL measurement is a recommendation for keeping a load operating within safe pressure. According to my Lee manual the Max COAL is 3.037" for 7.62x54R
What made you choose that overall length?Ok good to know. So if I’m .18 below coal I should pull and redo?
Ok good to know. So if I’m .18 below coal I should pull and redo?
I didn’t have my die set up correctly and seated the bullet too deep. @wankerjakeWhat made you choose that overall length?
It isn't necessarily wrong.
Usually I run based on chamber length, magazine length or cannelure location.
If either of the first two conditions aren't met. I don't use the combination.
I am not. It was basically the only data I could find for a .311 180grain bullet and Varget powder.Are you using a swift scirocco bullet? If not that listed OAL doesn’t mean anything
Agree with @Bfh_auto, how did you settle on that OAL?
Uuuh yeah that’s what I meant lolThat sheet says the round should be 2.975 and you made 2.75. That is a difference of 0.225" which is quite a lot as reloading goes. It also states that is a compressed charge and you seated much deeper than the data does. I would double check your powder and charge again.
Ok so that listed OAL just got not very important to you then. Why did you seat to the length you seated?I am not. It was basically the only data I could find for a .311 180grain bullet and Varget powder.
Seat one .311 into the case neck.I didn’t have my die set up correctly and seated the bullet too deep. @wankerjake
Ok. Does that impact the powder charge if the COAL is different than in the load data or can I use the same charge recommendations?Seat one .311 into the case neck.
See if it fits in the magazine. If not shorten it up slightly until it does.
Color it with a sharpie once you get a length that will fit the magazine. Shorten it until you don't get marks from the rifling. This is your max overall length for this rifle.
Ok. You’re probably right. I got my die set up correctly. Do you think it’s worth seating a couple bullets at the deeper length (the one I messed up) to see what results I get?I think it’s prudent to start at the lower end of the spectrum with different bullet and length but yes I would likely use the same data if it’s a similar composition bullet (cup and core or bonded)
Start at the minimum weight and work up.Ok. Does that impact the powder charge if the COAL is different than in the load data or can I use the same charge recommendations?
Perhaps. Did you start your load progression at the lowest charge level and work up? Are you now at the maximum charge level? If the answer to both questions is yes, I see no point in changing. If one notes excess pressure, perhaps adherence to the COL is needed.Ok good to know. So if I’m .18 below coal I should pull and redo?
That’s the depth of response I was hoping for. Thanks!Perhaps. Did you start your load progression at the lowest charge level and work up? Are you now at the maximum charge level? If the answer to both questions is yes, I see no point in changing. If one notes excess pressure, perhaps adherence to the COL is needed.
The COL is a maximum for operating through the action. The loaded round must be short enough to fit in the magazine, be it detachable or fixed. A revolver round must be short enough to not stick out the front of the cylinder and block rotation - or perhaps closing. On the other hand, too short a loaded cartridge will not cycle though the feed cycle of a semi-automatic arm (handgun or rifle). Lever action rifles require a certain maximum and minimum in other to function through the action (lifter and such).
As far as pressure goes, seating a bullet too deep - resulting in a 'short' loaded round will increase chamber pressure to an unknown degree. Depending how deep, it may run up pressure to a cataclysmic degree. (Worse case would be the bullet jamming powder all together, unless directed to use such a 'compressed load'.)
However, if everything works, the powder change is below an overcharge the maximum COL is likely meaningless within a few thousands of an inch.
Perhaps. Did you start your load progression at the lowest charge level and work up? Are you now at the maximum charge level? If the answer to both questions is yes, I see no point in changing. If one notes excess pressure, perhaps adherence to the COL is needed.
The COL is a maximum for operating through the action. The loaded round must be short enough to fit in the magazine, be it detachable or fixed. A revolver round must be short enough to not stick out the front of the cylinder and block rotation - or perhaps closing. On the other hand, too short a loaded cartridge will not cycle though the feed cycle of a semi-automatic arm (handgun or rifle). Lever action rifles require a certain maximum and minimum in other to function through the action (lifter and such).
As far as pressure goes, seating a bullet too deep - resulting in a 'short' loaded round will increase chamber pressure to an unknown degree. Depending how deep, it may run up pressure to a cataclysmic degree. (Worse case would be the bullet jamming powder all together, unless directed to use such a 'compressed load'.)
However, if everything works, the powder change is below an overcharge the maximum COL is likely meaningless within a few thousands of an inch.
Hello, New Mexico Jim. Read the last sentence in the second paragraph, please.Archie - go up and study the load data please. It plainly states compressed load for the 44.8 grain load.