Has anyone come across a good reference to determine the minimum recommended barrel length for the various burn rate powders? I know there are many considerations here, and mainly want to be sure to get in the ball park.
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Has anyone come across a good reference to determine the minimum recommended barrel length for the various burn rate powders? I know there are many considerations here, and mainly want to be sure to get in the ball park.
Caliber size with play a HUGH part in this. A powder will preform completly different in one cartrdige than in another. Case in point a 30BR you can not get too much 4198 into the case to get pressure, try filling a 22BR up the same way, and I think your insurace premimum will pay off. Also case capisity will also detwemin this a bit. Then to add the more powder you place in the cartridge the more time it will take to burn, alsp remember that some cartridges not all powders are right for it, try using 4150 in a 6BR, it just dont have enough case capisity to use the powder. With that all said most cartidges use similar burn rate powders, per the projectial weight, you not going to find a cartriidge that preforms well with two powders on the opsite sides of the map an example is N133 and Rutombo. More importantly than anything is to find the optimal barrel length for the cartridgeore you want to use.
This will get you in the ball park of what is optimal for the cartridge. (FAQs section.)
http://savageshooters.com/SavageForu...pic,508.0.html
In need to clarify. In this case I am more interested in the minimum barrel length to reasonably burn the powder for hunting application, specifically 22-250 for "flat" shooting.
Don't bother trying to match powder burn rate to barrel length, it simply doesn't work that way. With a certain cartridge, bullet and powder combination, your load is limited by either pressure or case capacity. All of this is completely independent of barrel length as the pressure peak occurs in the first inch or two of barrel length.
The difference in amount of powder burned usually only changes by 4-5% over several inches of barrel length and the percent burned doesn't matter for anything anyway. For example, according to Quickload, the .22-250 with a 55gn ballistic tip and H380 powder, the difference in burn percentage between a 16" barrel and a 26" barrel is less than 5%. In many cartridges the load that produces the best velocity does not have a 100% burn and a complete burn is a pointless goal to pursue.
Find the powder that gives you the best accuracy and acceptable velocity and call it good.