Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
Zeb B, hillcountryredraider, duckbrx, yodasheet, Harddr672
60446 Registered Users
Top Posters
dogcatcher 77387
stxranchman 52092
RWH24 44568
rifleman 43783
BOBO the Clown 41089
BMD 40539
Big Orn 37484
txshntr 33684
bill oxner 32627
sig226fan (Rguns.com) 30570
facebook
Forum Stats
60446 Members
45 Forums
475837 Topics
6242361 Posts

Max Online: 16728 @ 03/25/12 08:51 AM
Page 1 of 2 1 2 >
Topic Options
#6209855 - 03/04/16 02:55 PM 6.8SPC vs 6.5G
TexFlip Online   content
THF Trophy Hunter

Registered: 08/18/12
Posts: 8635
Loc: Harris County
10" barrel shooting deer and hogs out to 250 yards. Is there even a distinct edge one has on the other?
_________________________

Top
#6209868 - 03/04/16 03:17 PM Re: 6.8SPC vs 6.5G [Re: TexFlip]
Sneaky Online   content
The "Grouch"

Registered: 10/22/12
Posts: 15874
Loc: Winters
At that distance, no. Some will say that the 6.8 does better in a shorter barrel, which isn't really true at carbine lengths. At 10", it may have some bearing. I'm not familiar with how they compare in a barrel that short.
_________________________

Top
#6209879 - 03/04/16 03:29 PM Re: 6.8SPC vs 6.5G [Re: TexFlip]
kmon1 Online   content
junior

Registered: 09/27/06
Posts: 20290
Loc: Texas
The rounds themselves are very similar in what they will do inside 200 yards, after that advantage Grendel due to higher BC bullets available. The Nosler 6.5mm 129gr accubond is a wild card in this being a bullet that has a high BC and expands at 1300fps and up. There are reports of it expanding at 350 yards from 12.5 inch barreled SBRs. Plus the higher BC with the retained velocity will put more energy on the deer or hog.
_________________________
Guidelines / Rules of Conduct
http://www.texashuntingforum.com/rules.htm

RULES for using the TRADING POST
http://www.texashuntingforum.com/forum/u..._PO#Post1959111

Top
#6209893 - 03/04/16 03:48 PM Re: 6.8SPC vs 6.5G [Re: kmon1]
Cleric Offline
Veteran Tracker

Registered: 03/11/12
Posts: 2579
Originally Posted By: kmon1
The rounds themselves are very similar in what they will do inside 200 yards, after that advantage Grendel due to higher BC bullets available. The Nosler 6.5mm 129gr accubond is a wild card in this being a bullet that has a high BC and expands at 1300fps and up. There are reports of it expanding at 350 yards from 12.5 inch barreled SBRs. Plus the higher BC with the retained velocity will put more energy on the deer or hog.


I am debating this right now. If my math and assumptions are right you could have full expansion out to 450 yards

I would pick the bullet you want. For some odd reason I like nosler

Top
#6209913 - 03/04/16 04:10 PM Re: 6.8SPC vs 6.5G [Re: TexFlip]
huntandfish Offline
Pro Tracker

Registered: 11/29/07
Posts: 1677
Loc: Seclusion, tx
No much difference between the two out to 300 or 350 yards with shorts barrels, then the better bc of the grendel holds more energy. Grendel seems to really kick butt with a nice long barrel. I was on the fence also, but went with the 12.5" 6.8 because i dont shoot out past 300 yards! Flip a coin. Still thinkng about building a grendel also.

Top
#6209916 - 03/04/16 04:14 PM Re: 6.8SPC vs 6.5G [Re: TexFlip]
Pig_Popper Online   content
Tracker

Registered: 08/16/15
Posts: 573
Loc: Fort Worth
Choose the cheaper one to shoot
_________________________
I smell Bacon

Top
#6209920 - 03/04/16 04:18 PM Re: 6.8SPC vs 6.5G [Re: TexFlip]
kmon1 Online   content
junior

Registered: 09/27/06
Posts: 20290
Loc: Texas
Just ran through quickloads the Grendel 129gr Nosler at same load I am using in the Grendels shows 2124fps from a 10 inch barrel. The 123gr Hornady shows using the accepted max load of 8208XBR shows 2132fps. Note different powders but the loads I am running in Grendels with 22 and 24 inch barrels.

In reality would expect velocities close to those when running a can on the 10 inch barrels.
_________________________
Guidelines / Rules of Conduct
http://www.texashuntingforum.com/rules.htm

RULES for using the TRADING POST
http://www.texashuntingforum.com/forum/u..._PO#Post1959111

Top
#6209951 - 03/04/16 04:42 PM Re: 6.8SPC vs 6.5G [Re: TexFlip]
Cleric Offline
Veteran Tracker

Registered: 03/11/12
Posts: 2579
One issue I have with 6.5g short barrels is price. They are proud of them

Alexander arms has a 16in for 200ish that looks tempting

Top
#6209962 - 03/04/16 04:54 PM Re: 6.8SPC vs 6.5G [Re: TexFlip]
QuitShootinYoungBucks Online   content
THF Trophy Hunter

Registered: 11/01/12
Posts: 6466
Loc: Lubbock, TX
If you're not going to roll your own, keep ammo availability in mind. For instance, Midway has 17 listings for 6.8, only 5 for 6.5. Grendel will also be more expensive to shoot if you're not hand-loading.
_________________________

Top
#6210040 - 03/04/16 06:06 PM Re: 6.8SPC vs 6.5G [Re: QuitShootinYoungBucks]
JCB Online   content
THF Celebrity

Registered: 02/06/07
Posts: 22837
Loc: M.I.A.
Originally Posted By: QuitShootinYoungBucks
If you're not going to roll your own, keep ammo availability in mind. For instance, Midway has 17 listings for 6.8, only 5 for 6.5. Grendel will also be more expensive to shoot if you're not hand-loading.


This was the deciding factor for me. And on top of that if I plan on shooting more than 250 yards I wont have the 6.8 in my hand anyway.
_________________________

Top
#6210048 - 03/04/16 06:12 PM Re: 6.8SPC vs 6.5G [Re: TexFlip]
huntandfish Offline
Pro Tracker

Registered: 11/29/07
Posts: 1677
Loc: Seclusion, tx
Just bought a bunch of the federal xm6.8 90 grain protected bonded softpoint that was on sale at palmetto state arms for 9.99 a box. Sale ended at noon. Good 250 yard deer and hog factory ammo.

Top
#6210799 - 03/05/16 01:23 PM Re: 6.8SPC vs 6.5G [Re: kmon1]
hdfireman Offline
Tracker

Registered: 11/29/09
Posts: 719
Loc: Flower Mound
Originally Posted By: kmon1
Just ran through quickloads the Grendel 129gr Nosler at same load I am using in the Grendels shows 2124fps from a 10 inch barrel. The 123gr Hornady shows using the accepted max load of 8208XBR shows 2132fps. Note different powders but the loads I am running in Grendels with 22 and 24 inch barrels.

In reality would expect velocities close to those when running a can on the 10 inch barrels.



I don't know about 10" barrels but in a 12.5" the 6.8 is pushing factory Hornady 120gr SST's at 2410fps. Can you run the Grendel in a 12.5" to compare apples to apples. IIRC in 16" barrels and shorter the 6.8 edges out the 6.5 Grendel until 250 yards or so.
_________________________

eric@blackstonearms.com
214-945-5520
The 6.8 is the #1 choice for hunting deer and hogs in an AR15

Top
#6211668 - 03/06/16 10:48 AM Re: 6.8SPC vs 6.5G [Re: TexFlip]
Dalee7892 Offline
Tracker

Registered: 05/04/15
Posts: 985
Loc: Denton County
Okay, everyone looks at the difference between the 6.8 and 6.5. What about the 7.62x39 between the the other two?

Top
#6211845 - 03/06/16 02:11 PM Re: 6.8SPC vs 6.5G [Re: TexFlip]
shightower Online   content
Woodsman

Registered: 08/26/12
Posts: 125
I don't know about 6.5.
My 6.8 dropped 6 inches at 200 yards shooting ssa 110 grain.
I couldn't get use to how it shot so I sold it and just shoot my 270.





Edited by shightower (03/06/16 02:14 PM)

Top
#6211920 - 03/06/16 03:30 PM Re: 6.8SPC vs 6.5G [Re: TexFlip]
kmon1 Online   content
junior

Registered: 09/27/06
Posts: 20290
Loc: Texas
The 6.8 max SAAMI pressure is 6740 PSI higher than the Grendel pretty much negating the 10% more powder volume. Take that into account with the higher expansion ratio of the larger bore and shorter bearing surface of the bullets commonly used in them the 6.8 usually has a higher muzzle velocity in the same barrel. Where the Grendel makes that up is with sectional density and BC. Bullets of the same construction the higher sectional density ones will penetrate more. There have been enough discussions of BC on here not to really need to expound on now. Inside 200 or even 250 yards it is pretty much a draw between the 2 cartridges but if you want to go longer the higher BC wind out with more retained velocity and energy with flatter trajectory.

For the OP, like posted earlier inside 250 yards there really isn't enough difference to matter, past that advantage to the 6.5.
_________________________
Guidelines / Rules of Conduct
http://www.texashuntingforum.com/rules.htm

RULES for using the TRADING POST
http://www.texashuntingforum.com/forum/u..._PO#Post1959111

Top
Page 1 of 2 1 2 >



© 2004-2016 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide