Nightforce G7 help!!!!!!!!!!!!!!

[inline6power]

well we sent my old mans gun to gunwerks to have a g7 nightforce put on. i also have one getting put on my 7lrm they are building me. this is the first time him and i have went to a turret setup. i fully understand MOA and so on but have a question.
my dads gun is a 338-378 weatheryby . he is shooting a sierra match king in 300 grains. velocity is 2715 and bc is .768 and the turret they put on is set for 5000 ft ele. we have a BR2 rangefinder coming so diff elevations will not matter. now here is the question and the problem we are having. Gunwerks said the gun shot GREAT and they were bangin steel out to 1350yds. we get the gun home and take it out last week to shoot it and get use to the new scope. we set a target up at 202 yards and the first shot was about 8 inches high. we are at 400ft on elevation and just dont see how 4500ft of elevation difference can change 8 inches at 200yds. we had to dial the turret back to the zero stop to even come close at 200 yards and we were still 2 inches high even at the zero stop. i understand elevation will change poi, but if your zero is at 200yds, realistically that should not change at any elevation by 8 inches. do we need to re zero the scope at 200yds here where we are shooting? what will that do to the turret thats already setup for the gun? sorry for the noobish questions its just this is the first time using a turret and it just dont seem right. gunwerks said it shot flawlessly and i just dont fully understand this problem. with the BR2, its suppost to be a range target, dial turret, and shoot system. so not sure if i need to re zero the scope and will i have to do this for every different elevation we go to even if we have a BR2 thats matched to the guns profile? thanks in advance.

 

[Terry Scott]

Best Bet is to give one of the guys, maybe Mike a call @ G7 a call, easy fix.

 

[inline6power]

Best Bet is to give one of the guys, maybe Mike a call @ G7 a call, easy fix.

just did that. talked to the guys and figured it out. thanks and sorry for the long post.

 

[rick523]

Well............Don't leave us hangin what was the problem-fix ? lightbulb

 

[inline6power]

Well............Don't leave us hangin what was the problem-fix ? lightbulb

Got to re zero to 200. They are not sure how it's that far off going from 5k to 400ft but they said re zero to 200 here and everything else will be spot on again. Will do that again this weekend and shoot out to 1000 and test it. I will keep you guys updated

 

[rick523]

Got to re zero to 200. They are not sure how it's that far off going from 5k to 400ft but they said re zero to 200 here and everything else will be spot on again. Will do that again this weekend and shoot out to 1000 and test it. I will keep you guys updated

Ok thanks, are you going to have to rezero when you go to 5000ft. or did they say? If so that could be a PITA

 

[inline6power]

Ok thanks, are you going to have to rezero when you go to 5000ft. or did they say? If so that could be a PITA

I will not have to re zero because I have a br2 rangefinder coming that's set for this guns stats. Rangefinder compensates for elevation and tells me where to dial. They said elevation should not have any difference on poi at 200 yards. They said elevation truly don't effect poi until after 500 yards so your 200 zero should in theory be very very close to the same no matter what the elevation is

 

[rick523]

That will be a good deal, hope it all works out for you. I guess you must be planning a trip out West, going by the elevation you are at now. Good luck let us know how you make out. I'm waiting on June 30th to see if we got drawn for Mule deer and Antelope in Wy. If so will be there in September.

 

[Greyfox]

I'm on board with the re-zero, but have also had situations where others have tried my rifle in the field, and POI was different due to the individual's shooting style, particularly with heavier calibers. The variation is typically vertical. Bipod loading, cheek weld, and how tight the butt is pulled into the shoulder seem to be variables. Last season a buddy shot my rifle and produced a comparable group to mine that was a foot high at 500 yards. When I told him to lighten his cheek weld, the impact points were very close to mine. Having said that, 8" at 200 yards seems like a lot. I generally leave about 2 MOA of room with my zero stop for re-zero when changing locations. The change is usually a couple of clicks, if any, at 200 yards. This is for a location change from East coast 300ft altitude to Wyoming 5000ft. My turrets are set for 5000ft, and, I also use a G7 rangefinder.

 

[inline6power]

I'm on board with the re-zero, but have also had situations where others have tried my rifle in the field, and POI was different due to the individual's shooting style, particularly with heavier calibers. The variation is typically vertical. Bipod loading, cheek weld, and how tight the butt is pulled into the shoulder seem to be variables. Last season a buddy shot my rifle and produced a comparable group to mine that was a foot high at 500 yards. When I told him to lighten his cheek weld, the impact points were very close to mine. Having said that, 8" at 200 yards seems like a lot. I generally leave about 2 MOA of room with my zero stop for re-zero when changing locations. The change is usually a couple of clicks, if any, at 200 yards. This is for a location change from East coast 300ft altitude to Wyoming 5000ft. My turrets are set for 5000ft, and, I also use a G7 rangefinder.

so you still have to re zero even though you have their rangefinger thats suppose to compensate for elevation change? that SUCKS *** if thats the case. the whole reason i got the BR2 is so i wouldnt have to re zero at different altitudes.

 

[Greyfox]

so you still have to re zero even though you have their rangefinger thats suppose to compensate for elevation change? that SUCKS *** if thats the case. the whole reason i got the BR2 is so i wouldnt have to re zero at different altitudes.

I think it would be wonderful if the capability of a rangefinder would eliminate the need for re-zeroing your rifle, but it has little to do with it. The ballistic program in a rangefinder or handheld assumes the rifle is zeroed to drive it's output. Once zeroed, the G7will provide a corrected output given the basic entry info is valid. Zeroing the rifle is independent, and a confirmation that something hasn't changed since the last zero was established. Changes in atmospheric conditions, change in altitude, scope knocked out of alignment during travel, or just plain confidence to confirm that something hasn't gone out of whack are a few reasons to rezero before a hunt or other event that you want to be absolutely sure of the performance of the rifle. Once the basic zero is established, the G7 will very effectively compensate for a change in altitude/air density, temperature, etc. I have one rifle that hasn't had the zero adjusted at various locations and air travel for three seasons. A couple of others need some adjustment. I think the particular rifle components, construction, and hand load quality(like use of temperature insensitive powder) could have something to do with it. iMHO,

 

[inline6power]

I think it would be wonderful if the capability of a rangefinder would eliminate the need for re-zeroing your rifle, but it has little to do with it. The ballistic program in a rangefinder or handheld assumes the rifle is zeroed to drive it's output. Once zeroed, the G7will provide a corrected output given the basic entry info is valid. Zeroing the rifle is independent, and a confirmation that something hasn't changed since the last zero was established. Changes in atmospheric conditions, change in altitude, scope knocked out of alignment during travel, or just plain confidence to confirm that something hasn't gone out of whack are a few reasons to rezero before a hunt or other event that you want to be absolutely sure of the performance of the rifle. Once the basic zero is established, the G7 will very effectively compensate for a change in altitude/air density, temperature, etc. I have one rifle that hasn't had the zero adjusted at various locations and air travel for three seasons. A couple of others need some adjustment. I think the particular rifle components, construction, and hand load quality(like use of temperature insensitive powder) could have something to do with it. iMHO,

great description. thanks.

 

[rick523]

Greyfox, good answer that was what I was driving at. Seemed to me it would have to be rechecked at least and possibly re-zeroed. On a different note (and I don't want to hi-jack this thread) remember I told you I purchased a 5r 300wm a few months back? I decided to start working on a load for it, your not gonna believe this the D thing would not chamber a round, Remington didn't finish the chamber. My dealer called them, and returned the rifle, it was supposed to be replaced by a different rifle, they called him on Monday to let him know they received it when he asked where mine was they started hem-hawing around knowing they were just gonna re-barrel that one, so he told them to put a barrel on it from the custom shop and return or don't expect him to order any more rifles from them. We'll see how it turns out. Sorry inline. And you are right that will suck ***. if that is indeed the case.

 

[Greyfox]

Greyfox, good answer that was what I was driving at. Seemed to me it would have to be rechecked at least and possibly re-zeroed. On a different note (and I don't want to hi-jack this thread) remember I told you I purchased a 5r 300wm a few months back? I decided to start working on a load for it, your not gonna believe this the D thing would not chamber a round, Remington didn't finish the chamber. My dealer called them, and returned the rifle, it was supposed to be replaced by a different rifle, they called him on Monday to let him know they received it when he asked where mine was they started hem-hawing around knowing they were just gonna re-barrel that one, so he told them to put a barrel on it from the custom shop and return or don't expect him to order any more rifles from them. We'll see how it turns out. Sorry inline. And you are right that will suck ***. if that is indeed the case.

It's really disheartening to hear that even the Milpecs can be dogs. They supposedly give them special attention. I gave up on the standard issue 700's years ago because of the hit or miss quality. My most recent purchase a few months ago was a 300 mag with the 24" barrel and threaded muzzle. I guess I lucked out for the 4th time, having bought three 308's since their intro, all being exceptional shooters. I have about 200 rounds through the new 300 and it's holding .25 MOA if I do my part. The Mark X trigger was junk though, and I had to replace it with a Timney which I really like. My buddy just received a 308, but hasn't shot it yet. I'll let you know how he does. Hope Remington gets your rifle fixed!