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6.5 Grendel NFG

#51
Re: 6.5 Grendel NFG

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bronco_buster</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Milan Metal</div><div class="ubbcode-body">thats pretty cheap. How many times can you reload brass? I know the wolf stuff is junk but how about Hornady and Lapua? </div></div>

PPU Grendel brass gave about 3 reloads before the primer pockets got loose. I've got 8 reloads on my AA/Lapua brass, always FL sized and still going. Hornady have 5 reloads and still going. No splits encountered except for the PPU stuff. Had 1 split in 100 rounds.

XBR is TITS!!!</div></div>

I got some of the old Wolf Gold which was contract built by Prvi. It actually did okay. (that was my first 6.5G) I then went on a bender and fireformed a ton of Winchester 7.62x39. That worked for a few loadings on each. All told I have 400 Win cases and about 260 are still good. 300 AA and 200 Lapua. I think I ruined 8 cases of AA and all the Lapua is still good. The Winchester is sitting until I may need it (if I ever need it). The AA and Lapua are mostly loaded (3 times) and waiting until I decide where I'm going to land in this world.

A comment I didn't get the chance to make regarding a number of posts back. My internet here sucks:

The 6.5 Grendel will beat the .308 at extended distances. The .308 will clean up on the Grendel inside 600 yds. There isn't that much difference in velocity in the basic precision loads of either cartridge coming out of standard length barrels. The difference is that the 6.5 has a much more ballistic efficient bullet. Which, plainly and simply, is a long range advantage. With a 1-10" twist the 175's coming out of a .308 re-stabilize well after going through the transonic range. So, while it may not perform as well as the Grendel in all aspects, it's certainly no slouch.
 
#52
Re: 6.5 Grendel NFG

I went with a 22" Black Hole Weaponry barrel for my Grendel and it shoots GREAT... The Grendel is for sure impressive at long ranges and mine is a tack driver for sure with several different loads.
 
#53
Re: 6.5 Grendel NFG

Thanks for all the info guys! I think I am going to get s progressive loader and try this reloading thing later this summer.

I ordered my QD billet side charging upper this week so I am looking forward to seeing that. Should get my barrel in the next couple of days so pretty soon I will have it all together. Just need some free floats and a sweet scope!
 
#57
Re: 6.5 Grendel NFG

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Azprc</div><div class="ubbcode-body">I am kinda looking for something better, 108 scenar's at 2540 with 20" barrel. Currently running n530. Is the 8208 really getting the higher velocity? </div></div>

Another hide member reported 2726fps with 108s cci450 and 29.5gr of 8208 24' barrel
 
#58
Re: 6.5 Grendel NFG

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Azprc</div><div class="ubbcode-body">I am kinda looking for something better, 108 scenar's at 2540 with 20" barrel. Currently running n530. Is the 8208 really getting the higher velocity?</div></div>

Yes, 8208 is single base and slightly faster than 4895. So you have something to gauge it by. The reason it works well is it has a soft pressure ceiling, unlike 4895. So, when you hit the natural pressure limit for that powder in that case there is forgiveness for the case instead of flattening or popping primers.

I'll explain by saying how the latest and greatest powders, of which 8208 is one, are made. In the past, powder burn speed was determined by kernel (or ball) size. Then powders started getting coated to help with long term storage and temp sensitivity. That led up to Hodgdons "Extreme" series of powders. What Hodgdon did halve the kernel size and then coat the powder with a burn retardant. The smaller kernel burns more quickly and creates a high pressure spike. But, the burn retardant limits the speed at a certain pressure/temperature. So the powder reaches a spike then plateaus.
One more improvement to this was made by the Swiss in Reloader 17 in which they mixed a burn retardant in with powder compound. This gave a longer more controlled burn. From what I can see, 8208 is made using the same process as RE-17. It's just intended to naturally burn faster.
Keep in mind the difference between <span style="font-weight: bold">coated</span> and <span style="font-weight: bold">integrally mixed</span> burn retardants. Mixed is more efficient and consistent.

One thing a lot of people misunderstand is that the retardant is still pretty much inactive until it hits a certain pressure/temperature. At that point, the retardant molecules are "cracked" (sending off isotopes) and become active. You can still get blown primers and hot situations with these new powders as the amount of retardant, by the nature of smokeless powder, is limited to what a kernel can carry. Meaning use too much of it and you burn all the retardant and once again you still have hot gasses combining chemically and producing pressure. All a retardant can do is limit the pressures for a short while. Once the amount of retardant is chemically spent in a load, that's it. You have no more retardant slowing down the burn.

Bottom line: I found 29 gr. of 8208XBR behind a 123 gr. was giving much better velocities than anything else I tried. I know you can start there and work up with 108's.
 
#59
Re: 6.5 Grendel NFG

here's a really excellent compilation of testing of some of the newer extreme powders, currently running on

65grendel.com:http://www.65grendel.com/forum/showthread.php?2804-More-Chrony-reports!!-((WARNING!))-lots-of-pics.
 
#60
Re: 6.5 Grendel NFG

So I should get my barrel tomorrow and I don't think it has a gas block, tube ect. Do I need a certain kind for this caliber? I am going to run free float hand guards so i need a low profile correct? Any suggestions?

Anyone in my area (southeast MI/northwest OH)) have knowledge to put my new upper together? I would rather learn from a person than a video/book.
 
#61
Re: 6.5 Grendel NFG

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Milan Metal</div><div class="ubbcode-body">So I should get my barrel tomorrow and I don't think it has a gas block, tube ect. Do I need a certain kind for this caliber? I am going to run free float hand guards so i need a low profile correct? Any suggestions?

Anyone in my area (southeast MI/northwest OH)) have knowledge to put my new upper together? I would rather learn from a person than a video/book. </div></div>

you need to look up the specs for the barrel and order one that will fit the OD of where the gas block sits, depending on where the gas system is on the barrel depends on what gas tube length you need, probably a rifle length, so unless your planing on running a 15 inch long handguard any gas block will fit with a 12 inch rifle length handguard as long as the OD matches the barrel, I use adjustable gas blocks, I have a JP on my .223 and a PRI on my grendel. being able to cut back the gas on the rifle can really help with felt recoil for a faster second shot.
 
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