Grouping after 7 to 8 shots
Moderator: Mod
-
- Posts: 15
- Joined: Sun Nov 26, 2017 4:56 am
Grouping after 7 to 8 shots
I have a 26 inch heavy barrelled Howa in 6.5 Creedmoor wearing a Vortex Golden Eagle 15-60 scope. On the bench I have got it holding 1/4 to 1/2 MOA inch groups at 200 meters. The load is a 140 grain Hornady ELDM sitting over 42 grains of AR2208 lit by a Federal 210m in a Nosler custom case. Projectile is seated 20 thou of the lands. The problem is shots wandering after 7 to 8 rounds which I suspect is from heat build up in the barrel despite stretching out the time between shots to the maximum allowed time.
Short of putting a straight bull barrel on it is there any tips or tricks anyone is willing to share that may help this rifle hold a 10 shot group together?
Short of putting a straight bull barrel on it is there any tips or tricks anyone is willing to share that may help this rifle hold a 10 shot group together?
-
- Posts: 189
- Joined: Fri Mar 17, 2017 7:58 pm
Re: Grouping after 7 to 8 shots
Is it the factory Howa Barrel or another Aftermarket barrel? if so what is the profile?
-
- Posts: 130
- Joined: Sun Feb 11, 2018 5:47 pm
- Location: Cairns
Re: Grouping after 7 to 8 shots
Snow
Out of curiosity is this in a custom or factory stock, if custom is it bedded ? The factory stock seems very flexible in forend and if shooting of bipod or rest, let’s just say watching the stock under recoil it is not the most rigid. Do you have any photos.
Cheers
Mozzie
Out of curiosity is this in a custom or factory stock, if custom is it bedded ? The factory stock seems very flexible in forend and if shooting of bipod or rest, let’s just say watching the stock under recoil it is not the most rigid. Do you have any photos.
Cheers
Mozzie
My truck doesn’t run on love, it runs on diesel.
However, I love my rifle and it runs on lead.
However, I love my rifle and it runs on lead.
-
- Posts: 7501
- Joined: Wed Jun 15, 2005 8:22 pm
- Location: Maffra, Vic
Re: Grouping after 7 to 8 shots
Snow wrote:I have a 26 inch heavy barrelled Howa in 6.5 Creedmoor wearing a Vortex Golden Eagle 15-60 scope. On the bench I have got it holding 1/4 to 1/2 MOA inch groups at 200 meters. The load is a 140 grain Hornady ELDM sitting over 42 grains of AR2208 lit by a Federal 210m in a Nosler custom case. Projectile is seated 20 thou of the lands. The problem is shots wandering after 7 to 8 rounds which I suspect is from heat build up in the barrel despite stretching out the time between shots to the maximum allowed time.
Short of putting a straight bull barrel on it is there any tips or tricks anyone is willing to share that may help this rifle hold a 10 shot group together?
Another possibility is that the barrel is fouling? The test is to see if it returns to good groups after leaving it to get cold again (without cleaning).
-
- Posts: 270
- Joined: Fri Sep 30, 2005 2:37 pm
- Location: PERTH
Re: Grouping after 7 to 8 shots
42 grains of AR2208 would seem RED HOT load to me !!
BRETT BUNYAN F CLASS OPEN SHOOTER W.A.
-
- Posts: 254
- Joined: Sat Mar 02, 2013 9:49 pm
- Location: Queensland
Re: Grouping after 7 to 8 shots
BRETT B wrote:42 grains of AR2208 would seem RED HOT load to me !!
About 6 grains over max in a Creedmoor
-
- Posts: 574
- Joined: Sat Aug 15, 2015 9:51 pm
Re: Grouping after 7 to 8 shots
Longranger wrote:BRETT B wrote:42 grains of AR2208 would seem RED HOT load to me !!
About 6 grains over max in a Creedmoor
Yep, I wouldn't go near that load even with 2209.
-
- Posts: 130
- Joined: Sun Feb 11, 2018 5:47 pm
- Location: Cairns
Re: Grouping after 7 to 8 shots
Snow
I’d still like to see photos of your setup of the rifle if you have any ? Also photos of the target with grouping issues also ?
I’d still like to see photos of your setup of the rifle if you have any ? Also photos of the target with grouping issues also ?
My truck doesn’t run on love, it runs on diesel.
However, I love my rifle and it runs on lead.
However, I love my rifle and it runs on lead.
-
- Posts: 1629
- Joined: Wed Aug 05, 2009 9:49 am
Re: Grouping after 7 to 8 shots
any extraction problems ??? are you sure you dont mean 2209 ?? any shrapnel ??
id quod est
-
- Posts: 15
- Joined: Sun Nov 26, 2017 4:56 am
Re: Grouping after 7 to 8 shots
BRETT B wrote:42 grains of AR2208 would seem RED HOT load to me !!
Sorry,,typo on my behalf,,using 2209.
The barrel is Howa's 26 inch varmint and the stock is a GRS. Action has been bedded and barrel is floated.
Will try letting it cool down then shoot another string.
thanks for all the replies
-
- Posts: 213
- Joined: Thu Jan 18, 2018 2:56 am
-
- Posts: 226
- Joined: Mon Feb 03, 2014 8:31 pm
- Location: Woodbrook Vic.
-
- Posts: 15
- Joined: Sun Nov 26, 2017 4:56 am
Re: Grouping after 7 to 8 shots
disb wrote:GRS Beserk?
Plastic stock version?
I am not sure what they are made out of? Black 'plastic' like material?
-
- Posts: 15
- Joined: Sun Nov 26, 2017 4:56 am
Re: Grouping after 7 to 8 shots
Trevor Rhodes wrote:l'm hearing the 6.5 creedmoor's are bad on coppering up.
Trevor I am not sure if it is the calibre or the barrel that is responsible but this one of mine coppers up pretty bad. Has fired approx 600 hundred rounds and been cleaned after every session but shows no sign of 'smoothing out'
-
- Posts: 15
- Joined: Sun Nov 26, 2017 4:56 am
Re: Grouping after 7 to 8 shots
Mozzie wrote:Snow
I’d still like to see photos of your setup of the rifle if you have any ? Also photos of the target with grouping issues also ?
Hi Mozzie. Will take some photos as soon as I get some free time and post them here. Cheers for your help to, much appreciated.
Return to “Equipment & Technical”
Who is online
Users browsing this forum: No registered users and 42 guests