Hosted by autogun
This is intended for people interested in the subject of military guns and their ammunition, with emphasis on automatic weapons.
Latest 24-Dec by stancrist
Latest 9:24 by nincomp
Latest 24-Jan by Farmplinker
Latest 24-Jan by RovingPedant
Latest 24-Jan by gatnerd
Latest 21-Jan by autogun
Latest 20-Jan by stancrist
Latest 20-Jan by Red7272
Latest 19-Jan by Jeff (Jefffar)
Latest 19-Jan by Red7272
Latest 19-Jan by Farmplinker
Latest 18-Jan by gatnerd
Latest 17-Jan by autogun
Latest 17-Jan by Mr. T (MrT4)
Latest 15-Jan by roguetechie
Latest 13-Jan by renatohm
Latest 13-Jan by roguetechie
Latest 11-Jan by pg55555
Latest 11-Jan by mpopenker
Latest 10-Jan by autogun
Latest 10-Jan by stancrist
Latest 5-Jan by Red7272
Latest 2-Jan by renatohm
Latest 2-Jan by TonyDiG
Latest 2-Jan by Mustrakrakis
Latest 1-Jan by graylion
Latest 31-Dec by renatohm
Latest 31-Dec by smg762
Latest 30-Dec by DavidPawley
Latest 28-Dec by DavidPawley
Latest 28-Dec by graylion
Latest 28-Dec by DavidPawley
Latest 26-Dec by graylion
Latest 25-Dec by DavidPawley
Latest 25-Dec by renatohm
26-Nov
I suspect the Serb military has plenty of people who "know" "you can't trust them little bullits", just like the rest of the world.
26-Nov
Red7272 said:Interesting departure from the usual round choices. Certainly an improvement over the 7.62x39 but inferior to the 5.45x39 as long as one stays with non fragmenting projectiles.
What is your basis for that claim? Do you have gel tests for 6.5 Grendel with steel-core projectiles configured/constructed like 5.45 bullets?
26-Nov
autogun said:The performance does seem a bit high if this round really is the same size as a Grendel. I wonder what the chamber pressure and barrel length are?
The velocity figures in the article are for 6.5 Grendel loadings listed on the Prvi website: https://www.prvipartizan.com/rifle_ammo.php
Barrel length -- 24" / 610mm
26-Nov
Probably the best application for the 6.5 Grendel is in a 12.5" barrel SBR. Velocity for a 123gr is 2200-2300fps depending on load - within ~150fps of the 18" barrel.
This would give a very short and handy carbine that still has very respectable long range performance relative to its size, and without the awful blast associated with other SBR's due to the lower chamber pressure and wider swept bore.
No doubt a purpose designed new cartridge could perform better. But of existing cartridges 6.5 Grendel seems the most capable SBR (sub 14.5") barrel cartridge.
26-Nov
gatnerd said:This would give a very short and handy carbine that still has very respectable long range performance relative to its size, and without the awful blast associated with other SBR's...
Color me skeptical. Is it proven that a 6.5 Grendel SBR does not also have an awful muzzle blast, or are you just assuming that to be the case?
gatnerd said:No doubt a purpose designed new cartridge could perform better. But of existing cartridges 6.5 Grendel seems the most capable SBR (sub 14.5") barrel cartridge.
Perhaps, but I can't help but wonder how 6.5 Grendel compares to 6.8 SPC and Shoffner's 6.5x40,
26-Nov
stancrist said:What is your basis for that claim? Do you have gel tests for 6.5 Grendel with steel-core projectiles configured/constructed like 5.45 bullets?
A 50% heavier round with 50% more recoil? It's up the that round to prove it's performance. Particularly since a 5.45 loaded to the same pressures as the the Execution-484 round would top 950 mps with a 3.5 gram 5.45 projectile.
26-Nov
So, you don't actually know -- or have any test data to prove -- that terminal effects of 6.5 Grendel would be inferior to 5.45x39, you're just assuming it would.
26-Nov
stancrist said:Color me skeptical. Is it proven that a 6.5 Grendel SBR does not also have an awful muzzle blast, or are you just assuming that to be the case?
Assumption on my part based on experience with short barrel 7.62x39 'pistols' 8-10" in length.
They are much louder then a 9x19/.45 handgun, but less loud then 5.56 'pistols' of 10-12" length.
More of a 'Boom' then the harsh 'CRACKBANG' of the short barrel 5.56.
Not exactly scientific but thats my experience from half a dozen range encounters with them.
If someone has Quickload, they can measure the 'muzzle exit pressure' for 6.5 vs 5.56 out of different barrel lengths. I suspect it will be a good bit lower for 6.5 of equivalent barrel length.
26-Nov
gatnerd said:stancrist said: Color me skeptical. Is it proven that a 6.5 Grendel SBR does not also have an awful muzzle blast, or are you just assuming that to be the case?
Assumption on my part based on experience with short barrel 7.62x39 'pistols' 8-10" in length. They are much louder then a 9x19/.45 handgun, but less loud then 5.56 'pistols' of 10-12" length. More of a 'Boom' then the harsh 'CRACKBANG' of the short barrel 5.56. Not exactly scientific but thats my experience from half a dozen range encounters with them.
Okay. I'll accept that.
26-Nov
stancrist said:So, you don't actually know -- or have any test data to prove -- that terminal effects of 6.5 Grendel would be inferior to 5.45x39, you're just assuming it would.
I made no reference to terminal effect, that is your assumption.