FireFlyFishing
Well-Known Member
Why some have 14" barrels for long action magnum cartridges gets me questioning why?
SBR MAG. Nope…
Why some have 14" barrels for long action magnum cartridges gets me questioning why?
It's not so much thinking out loud, but asking the forum questions about their decisions.What are you asking exactly? You end every sentence with a ? But it seems like you're more thinking out loud than asking a specific question.
Barrel lengths and velocity loss/gain has been covered literally thousands of times on Internet forums.
Do you have preference on barrel lengths based on cartridges or velocities?????I don't think you'll find that most people are using 14" barrels for hunting, SBR or not. I still don't understand what you're trying to ask here.
I get some of my best speed in my short barrels using the same powders that give best velocity in long barrels.For me, it all comes back to the burn rate of the powder I plan to use. Slow powders need long barrels. Fast powders don't. In general I use 22" barrels for Varget, 26" for H4350, 28" for H4831sc, 30" for H1000, and 32" for Retumbo.
The more overbore the case (and the heavier-for-caliber the projectile), the slower the powder needs to be. So, my 308 Win shooting a 150 gr bullet has a 22" barrel. My 28 Nosler shooting a 160 gr bullet has a 32" barrel.
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Kinda sorta, I use longer barrels to help the efficiency of slower burning powders, think velocity in terms of pressure over time. Slower powders have potential to produce higher velocities. Large volume cases have potential to hold a larger volume of powder.Do you have preference on barrel lengths based on cartridges or velocities?????
Do you have preference on barrel lengths based on cartridges or velocities?????
And those create more muzzle blast that maintain pressure at longer lengths (going by ql info). For long barrels (24" and longer) using faster powders generally give lower velocities (ql referencing). Without tweaking ql inputs on any of my loads most exit pressures are over 12k easy and some @ 16k (even on long barrels). Not sure if I want to pull the trigger on those! Accuracy overrides efficiency by a fine line. Both are possible, but more by case design?Kinda sorta, I use longer barrels to help the efficiency of slower burning powders, think velocity in terms of pressure over time. Slower powders have potential to produce higher velocities. Large volume cases have potential to hold a larger volume of powder.
More slower powder burning over a longer unit of time, typically produces higher velocities. IMO the whole point of improved cases and magnum cases is to hold larger volumes of slower burning powder. IMO it seems counter productive to shorten one of these barrels. But (and this is my big butt) sometimes it's deemed a necessary evil for reasons justified by the barrel owner.
Edit: See Cary Farmer's post. Dang, I need to read and/or type faster.