Help me under stand burn rate.....

[tacks]

In Reloading manuals you’ll see “% case fill”, that is what is being referenced.

Thanks, Makes sense.

What do most consider a min percent of case load?

Looking at Gordons comparing to the Barnes book, GRT is listing most a 100 fps less. GRT also warns of the max listed in the book as to hot.

 

[AZ_Hunter]

You want to be in the 90’s.

Use the loading manuals for data. That’s what they are for.

 

[Diamondback]

This is also why I like Nosler's online load data. They show case fill density relative to FPS.

 

[V00D00]

I do a lot of loading for 308 in a 16.5 barrel, tho I’m loading much heavier bullets. Hard to beat varget. I don’t know what the burn rate is. But clover leafs are hard to shy away from. I’ve tried pistol loads but quickly went back to rifle loads. Varget, imr4064, aa2250 has been the most accurate for me by far. I’ve found sub half moa with all three powders mentioned.

 

[Castle Rock]

You want to be in the 90’s.

Use the loading manuals for data. That’s what they are for.

Why do you say that?

 

[AZ_Hunter]

Why do you say that?

Because the OP really just needs to use a reloading manual….

I know that compressed loads can be fine (‘can’ is the key word), but obviously the poster is new at reloading so I answered the question with a generality instead of simply repeating the suggestion to use a reloading manual again… which is the best answer for his questions.

 

[AZ_Hunter]

I do a lot of loading for 308 in a 16.5 barrel, tho I’m loading much heavier bullets. Hard to beat varget. I don’t know what the burn rate is. But clover leafs are hard to shy away from. I’ve tried pistol loads but quickly went back to rifle loads. Varget, imr4064, aa2250 has been the most accurate for me by far. I’ve found sub half moa with all three powders mentioned.

I was going to say that from the beginning. Varget and 308 are best friends.

 

[Bluefish]

Because the OP really just needs to use a reloading manual….

I know that compressed loads can be fine (‘can’ is the key word), but obviously the poster is new at reloading so I answered the question with a generality instead of simply repeating the suggestion to use a reloading manual again… which is the best answer for his questions.

Imho looking at case fill can give an idea of burn speed vs usability of a powder in a cartridge. If you can get to a compressed load without over pressure, it’s slow for that use. If you are below 90% and hitting pressure it’s possibly too fast. With that said, I have found cfe223 runs best with just a little compression, 2-3% seems to give the best es and sd.

 

[AZ_Hunter]

Imho looking at case fill can give an idea of burn speed vs usability of a powder in a cartridge. If you can get to a compressed load without over pressure, it’s slow for that use. If you are below 90% and hitting pressure it’s possibly too fast. With that said, I have found cfe223 runs best with just a little compression, 2-3% seems to give the best es and sd.

I agree with that.

 

[tacks]

but obviously the poster is new at reloading so I answered the question with a generality instead of simply repeating the suggestion to use a reloading manual again…

Ha Ha, Sorry wrong. I just do not do much, been at it for 35 years. I usually just use the book, load up some that shoot well and call it a day. I have a lite Sako 308 that I have been playing with for years. It just gets put on the back burner till I need it, and still don't have a load as good as I want. Good enough, go hunting.

This year I put together a Tikka, chopped, threaded, fluted, stock, suppressor. I am committing more time to working on loads for it. So trying to furthering my knowledge and get a good load.

THANKS for ALL the reply's.

 

[Bluefish]

In Reloading manuals you’ll see “% case fill”, that is what is being referenced.

Thanks, Makes sense.

What do most consider a min percent of case load?

Looking at Gordons comparing to the Barnes book, GRT is listing most a 100 fps less. GRT also warns of the max listed in the book as to hot.

Make sure your case capacity in grt is correct. This is one of the biggest drivers in calculating pressure. Even a grain or two change will the calculations.

You can also adjust powder burn rate in quickload if you have velocity data from an actual load in your rifle. This allows you to true up your load to the calculations. In the end grt/ql are tools and do make some assumptions. Even load manual data needs to be worked up as each rifle can be different.

 

[AZ_Hunter]

Fair enough, I apologize for assuming you were new.

Good luck and glad to help.

 

[tacks]

Fair enough, I apologize for assuming you were new.

No need, I appreciate all advice/input.

I am also trying to keep recoil down for grand kids to shoot also.

 

[AZ_Hunter]

Fair enough, I apologize for assuming you were new.

No need, I appreciate all advice/input.

I am also trying to keep recoil down for grand kids to shoot also.

Copy.

The lower the charge weight the lower the recoil technically. But obviously bullet weight and velocity effect recoil more. If you can add a suppressor the equation, it’s a game changer for kids. A lot of their trepidation of “recoil” is actually from the blast. A suppressor removes that from the equation and helps them focus on the fundamentals without fear.

I have young kids.

A 223 with a can is perfect.