7MM Rem. Mag. & ELD-X Issue?

[Nwtman]

Hello all - I ran into a new one on me at the range. Rifle is a 7mm Rem. Mag., 24” barrel, 1:9.5. It is consistent with the “vintage” 175 and 170 grain rounds that were bought when it was roughly in 1980. It groups roughly an inch at two inches high at 100m, which is where I want it. However, this weekend I tried the factory 162 gr. ELD-X Precision Hunter ammo from Hornady. The groups were 1/2 inch or smaller. While they too are two inches high, the trouble is they are also six inches right of center. I am looking at loading some 178 gr. ELD-X rounds for it to see if the problem is bullet weight related, but any thoughts on what may be going on with the factory 162 gr. are appreciated. Thank you folks.

 

[chromatica]

It is well known that different loads can have differing points of impact. Select the load that meets your needs and then adjust your sights for it.

 

[Nwtman]

I guess I just haven’t seen a lateral shift of that magnitude and it made me wonder. Will dial the scope to the modern ammo. Thank you very much.

 

[Rob01]

You should stick with the 162s. The 7mm 175 ELD-X requires a 8.5 twist minimum and your twist of 9.5 is too slow.

 

[K22]

In my experience, changing the bullet can produce the largest change in POI. However, 6" is a lot.

If you adjust the scope and the load produces a consistent POI within your accuracy standards then I not sure what the issue is.

 

[Webster]

Hello all - I ran into a new one on me at the range. Rifle is a 7mm Rem. Mag., 24” barrel, 1:9.5. It is consistent with the “vintage” 175 and 170 grain rounds that were bought when it was roughly in 1980. It groups roughly an inch at two inches high at 100m, which is where I want it. However, this weekend I tried the factory 162 gr. ELD-X Precision Hunter ammo from Hornady. The groups were 1/2 inch or smaller. While they too are two inches high, the trouble is they are also six inches right of center. I am looking at loading some 178 gr. ELD-X rounds for it to see if the problem is bullet weight related, but any thoughts on what may be going on with the factory 162 gr. are appreciated. Thank you folks.

I had a factory 7mm Rem mag with a SS barrel years ago. It shot wallet groups with the Hornady 154 gr round nose bullet.