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Posted: 11/13/2016 3:08:42 AM EDT
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I'm planning a heavy barreled long range bench rifle, my question is at what point does length
give diminishing returns ? 18" , 20" .or 24"? |
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Quoted:
I read that the difference between a 20" and 24" barrel is only 100fps, which doesn't seem like enough bang for the buck to me. I'd be considering a 20" HBar with a Wilde chamber and 1/7 twist. Quoted:
Quoted:
24" will give you the best velocity. I read that the difference between a 20" and 24" barrel is only 100fps, which doesn't seem like enough bang for the buck to me. I'd be considering a 20" HBar with a Wilde chamber and 1/7 twist. Depends on the load. |
| Depends on cartridge, which cartridge did you have in mind. I considered many available options in 2009 and chose 6.5 Grendel. On large frame AR-10 I considered 7.62X51 and 6.5 CM/260. I just didn't want the expense, weight of the AR-10 platform so I decided to stick with AR-15 and 6.5 Grendel. Mild recoil, only 30-33 grains of powder, factory ammunition and has better long range performance of most intermediate cartridges. |
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Quoted:
I'm planning a heavy barreled long range bench rifle, my question is at what point does length give diminishing returns ? 18" , 20" .or 24"? too many varibles depends on loads/bullets you going to handload? shoot comm ammo? weight and lastly you want range, how far |
| The real reason for going with a longer barrel is velocity consistency. It's much easier to load with a slower burning powder and still get complete burn. When you use slower burning powders, your velocity deviation shrinks. Which provides better long range accuracy in the vertical string. |
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Quoted: The real reason for going with a longer barrel is velocity consistency. It's much easier to load with a slower burning powder and still get complete burn. When you use slower burning powders, your velocity deviation shrinks. Which provides better long range accuracy in the vertical string. If you do not plan on doing much more than unloading your rifle from your vehicle and setting it up on a bench or mat, then there is no reason not to go with the 24" barrel length, partly for the reason above and also because that extra 100 f.p.s. might come in handy at long range shooting at small targets (i.e. groundhogs). Why not get all the ballistic advantages you can as long as you'll never tote the beast any further than a short walk? FWIW, I have a 24" heavy barrel .223 Wylde 1:8" twist upper that shoots sub-inch groups at 200 yards (on my good days). I don't carry it anywhere except to and from the shooting bench. After owning this upper for two years, I considered having the barrel cut to 18" with a target crown but I can't make myself do it as I have PLENTY of other rifles to carry around in case I ever need to. I'm pretty sure I'm not going to mess this upper up being how accurate it is. |
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