Ogive to Base variance between barrels

[Sturn88]

[37L1]

If you are getting acceptable accuracy for your hunting needs, why mess with it?

Now if you are OCD or are wanting to get the tightest groups for each rifle barrel, then you need to load for each one.

And yes, they can vary, sometimes the same barrel made by the same factory is not the "same."

[Sturn88]

If you are getting acceptable accuracy for your hunting needs, why mess with it?

Now if you are OCD or are wanting to get the tightest groups for each rifle barrel, then you need to load for each one.

And yes, they can vary, sometimes the same barrel made by the same factory is not the "same."

I feel like If we weren’t all at least a little OCD, we wouldn’t be reloading in the first place

[LtDan]

I have 5 Grendel Barrels and not one of them are even close to be near the same. I have to load for each one differently

[maxxmojo]

My 16" AA is much shorter than my 18" Lilja. As mentioned I just note it and load accordingly.

[Sturn88]

Went ahead and shot the shorter loads out of both guns yesterday. Ended up picking up ~90 FP and my SD and ES were identical so I’ll be able to standardize that particular load

[BCHunter]

Yep, the shoulder bump may be highly variable also. I'm loading for 3 grendels. luckily 2 have similar bump but it's short .004" from unfired factory, my Odin is .010" from factory so after .003" bump back it's still longer then the other 2.

[JASmith]

The variability is a by-product of 1/2 degree portion of the compound throat.

One gets a robust tolerance for the differences of seating depths caused by magazine length constraints.

One result is that folks who get good accuracy with long-nosed 120-130 grain bullets also get good accuracy with 85-90 grain bullets.

[Texas]

There are a number of factors that go into the accuracy of a barrel. If you take a given barrel, and alter the profile to change its harmonics, you can have a significant variance in accuracy, especially with a gas gun