Would you bother to re-zero? (ammo change)

[pods8 (Rugged Stitching)]

Just to reiterate it all ammo in a given gun won’t hit the same spot at 100yd. The “zero”, can vary notably just due to the different bullet and ammo lot interacting with the barrel.

-The charts are about trajectory. But it requires knowing a zero point in your gun for that specific ammo to mean anything.

 

[Mtndawger]

Check zero. Numerous threads on RS to learn how to properly do it. Doing things right is usually more expensive up front but pays off long term with $ saved or aggravation minimized. Half assing almost anything is not a virtue

 

[Steve300xcw]

yes I'd re-zero.

I'm wouldnt worry too much about shooting a rokslide approved number of rounds.

Get three boxes of the new ammo and check your zero with a good sized group (10 shots). Make the required adjustments off that group. Then confirm it with another 10-shot group.

He's shooting 150yrds max.......

I usually buy 200 of the same lot, devote 20 to sighting in and confirming a good zero, then have the rest to hunt with for the rest of my life.

thats just sad

 

[Annapolis]

So if I’m reading the room, it sounds like people think I should rezero.

Really appreciate this, all.

 

[EdP]

I'm also in the check zero camp. Can you maybe do it at the hunt location?

 

[Annapolis]

I don’t think so—but I could probably ask around and find a farm or somewhere closer by where they’d let me do it.

 

[K9kodi]

Where in Maryland? Roughly?

 

[Annapolis]

Username says it all.

 

[Greenbelt]

I always check my zero even on a different box of same bullet as stated above. Personally I'm not gonna wait all year, put crazy time/effort into hunting, buying expensive gear, time away from family/work, to have it all go to shit over something that could have been worked out at the range in 10 min. I did it this morning on the same round I use every year but a new box. Also there never will be a waste of time at the range, no matter what.

 

[Macintosh]

I have had different lots of the same ammo be off by 4” at 100 yards, and thats with good sized groups. Usually it less difference, but you never know. So different bullets, yes, I always re-zero.
This is why people buy lots of ammo from a specific lot#. It matters less at 150 yards for sure, but it can still matter when you stack that difference on top of the guns precision and on top of your wobble.

 

[EastTX Jess]

@Annapolis something that hasn’t been mentioned yet is the need for a thorough cleaning. Use a good solvent and get all of the copper deposits from the old ammo out of the barrel before you sight in the copper impact ammo. You’ll save yourself some headache and tail chasing. The monometals have a tendency to group poorly when they follow gilding metal bullets without cleaning in between.