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Author Topic: 7mm Sight in help  (Read 18905 times)

Offline 270Shooter

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Re: 7mm Sight in help
« Reply #15 on: February 02, 2017, 07:20:32 PM »
Is the barrel free floated? Sorry if I missed that part. My browning a bolt does similar things in that the first 2 shots from a cold bore are always touching and right on the money. The third shot always screws my group and will fly out about an inch and a half. Not as pronounced as what you experienced but I've tried different loads and just decided it's good enough.

Offline Duckslayer89

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Re: 7mm Sight in help
« Reply #16 on: February 02, 2017, 07:40:46 PM »
Is the barrel free floated? Sorry if I missed that part. My browning a bolt does similar things in that the first 2 shots from a cold bore are always touching and right on the money. The third shot always screws my group and will fly out about an inch and a half. Not as pronounced as what you experienced but I've tried different loads and just decided it's good enough.

No man it's not free floated. I'm sure that would help though. Tomorrow is about extreme consistency in every shot and see what happens. I'll post pictures

Offline 270Shooter

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Re: 7mm Sight in help
« Reply #17 on: February 02, 2017, 07:42:03 PM »
Is the barrel free floated? Sorry if I missed that part. My browning a bolt does similar things in that the first 2 shots from a cold bore are always touching and right on the money. The third shot always screws my group and will fly out about an inch and a half. Not as pronounced as what you experienced but I've tried different loads and just decided it's good enough.

No man it's not free floated. I'm sure that would help though. Tomorrow is about extreme consistency in every shot and see what happens. I'll post pictures
if it shoots good when you let it cool down before every shot I'd say that's the issue

Offline Duckslayer89

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Re: 7mm Sight in help
« Reply #18 on: February 02, 2017, 07:50:16 PM »
Is the barrel free floated? Sorry if I missed that part. My browning a bolt does similar things in that the first 2 shots from a cold bore are always touching and right on the money. The third shot always screws my group and will fly out about an inch and a half. Not as pronounced as what you experienced but I've tried different loads and just decided it's good enough.

No man it's not free floated. I'm sure that would help though. Tomorrow is about extreme consistency in every shot and see what happens. I'll post pictures
if it shoots good when you let it cool down before every shot I'd say that's the issue

Ya I've been rushed the last few times going to the range because I show up at 3 and they close at 3:50. I'm going to take my time tomorrow. How can you tell if a barrel is worn out?

Offline ghosthunter

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Re: 7mm Sight in help
« Reply #19 on: February 02, 2017, 08:24:18 PM »
Take a magnifying glass and inspect the muzzle crown for nicks.
Since it was used when to bought it.
A nick in the crown can throw shots.
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Offline Duckslayer89

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Re: 7mm Sight in help
« Reply #20 on: February 02, 2017, 08:28:13 PM »
Take a magnifying glass and inspect the muzzle crown for nicks.
Since it was used when to bought it.
A nick in the crown can throw shots.

I would really like to send a bore camera down and see what's going on. I'm not sure what the technical term is

Offline rudysts

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Re: 7mm Sight in help
« Reply #21 on: February 03, 2017, 07:29:07 AM »
A couple things to check.
1 would be your action screws make sure they are torqued properly. with a wood stock maybe 50 inch pounds if it has pillars 60-65 inch pounds.
2 Check you crown on the muzzle for burrs. you can do this easily with a Q tip inserted in to the muzzle when you pull it out you should be able to feel if it catches or if it leaves fiber on the crown. the best way would be for a smith to borescope it.

 I have had this happen to me before after having a muzzle brake installed the so called smith screwed up the crown. so a friend who is also a member at your club re crowned it and it shot good after that.
Good luck to you.

Offline dyhardhuntr

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Re: 7mm Sight in help
« Reply #22 on: February 03, 2017, 07:33:52 AM »
My ruger 7mm did the same thing.(still does a little). I would shoot 2 shots decent and 1 flyer. I bedded the action and made sure the barrel was not contacting the stock and just about everything I could google I've tried,except reloading. I'm shooting the same grain bullets. My groups tightened up quite a bit but still have the flyer. My special ops buddy said it was the style of barrel. Once it warms up I guess the barrel whips more? It's a pencil style barrel I guess. My first 2 shots touch at 200 yards but that 3rd one is enough to make you scratch your head.

Have you tried tuning it with a Boss/brake?
I haven't tried the brake at all. I've thought about it but I've also thought about selling it and buying a tikka :chuckle:

Offline Duckslayer89

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Re: 7mm Sight in help
« Reply #23 on: February 03, 2017, 08:20:39 AM »
.

Offline Duckslayer89

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Re: 7mm Sight in help
« Reply #24 on: February 03, 2017, 08:22:26 AM »
The bullet went in without any push or anything all the way up to the casing as seen in picture. Is this gun done or what?

Offline Bill W

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Re: 7mm Sight in help
« Reply #25 on: February 03, 2017, 08:28:30 AM »
Houston, we have a problem!

Offline Duckslayer89

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Re: 7mm Sight in help
« Reply #26 on: February 03, 2017, 08:33:42 AM »
Houston, we have a problem!

Ya I'm not sure what to do now doesn't seem right

Offline BULLBLASTER

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Re: 7mm Sight in help
« Reply #27 on: February 03, 2017, 08:38:53 AM »
Houston, we have a problem!
How isn't the bullet fitting into the muzzle a problem?
Putting the bullet into the muzzle really doesn't tell you anything except where the ogive is.

Offline Bill W

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Re: 7mm Sight in help
« Reply #28 on: February 03, 2017, 10:54:21 AM »
Houston, we have a problem!
How isn't the bullet fitting into the muzzle a problem?
Putting the bullet into the muzzle really doesn't tell you anything except where the ogive is.

What it tells me is the bullet is too small for the rifling at the muzzle and possibly in other areas also.

Offline BULLBLASTER

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Re: 7mm Sight in help
« Reply #29 on: February 03, 2017, 11:02:36 AM »
Houston, we have a problem!
How isn't the bullet fitting into the muzzle a problem?
Putting the bullet into the muzzle really doesn't tell you anything except where the ogive is.

What it tells me is the bullet is too small for the rifling at the muzzle and possibly in other areas also.
Maybe that particular cartridge has the ogive only slightly in front of the case mouth? That test literally tells you nothing.   :twocents:
I'd like to see a 7mm comparator on the same cartridge.

 


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