OSA vs ADI 223 Blitzkings

[MG5150]

G'day Guys

When I first bought my .223 last year I was recommended 'Blitzking's' as the best factory ammo for farm shooting and went home with a packet.

Since then I've been to a few different gun shops around Melbourne and ask for the Blitzkings.

After some terrible shooting on Saturday night (missed all 7 foxes that presented shots) I went looking for the ammo and found a box that said 'OSA Buffalo River Blitzking' when I've been asking for ADI Blitzkings or just Blitzkings.

Are these two different types of ammo or the same company or a rebranding of a the same company?

If I've got two diffeent types of ammo it might explain why my gun was so off that night (I'd cleaned up the foxes with the thermal clip on the week before and can't figure out why I lost zero outside of clip-ons not holding zero well.

All help is appreciated

[No1Mk3]

ADI make the ammo for OSA/Buffalo River using 55g Sierra Blitzkings. I would attribute your problem to batch variation between the brandings of the same ammo.

[MG5150]

ADI make the ammo for OSA/Buffalo River using 55g Sierra Blitzkings. I would attribute your problem to batch variation between the brandings of the same ammo.

Excuse my inexperience but would batch variation lead to missing by 2-3 inches?

Perhaps the differences in batches is compounding with the lack of consistentcy with the clip on

[Over The Hill]

Put out a target at 100 and shoot a few of both types & see where they group. This should eliminate scope error from the equation however I suggest you give the scope mounts a good going over to make sure you don't have something loose there changing your POI

[Wapiti]

I use both, and both seem to be the exact same loading with exactly the same point of impact.
And I doubt very much ADI changes anything to put OSA on the box. Notice OSA also does the soft points as well as the Blitzkings. They also shoot identically in a couple of 223 bolt guns and a 7615 pump.

I also doubt batches of the same bullets, with the same ADI powder, change anything whatsoever.

[Fester]

When I got my .223 as the first centerfire, I tried lots of ammo and found that ADI stuff the most consistent and accurate grouping ammo around, was also about the cheapest.

Whether it was just me or not, the Buff River using the soft points (Game Kings) seemed to give the best groups.
I never had much POI change or re-zeroing needed.

I was advised that the ADI ammo using the Hornady 55gr pills didn't shoot as well as the Sierra pills.

When I started reloading, I found the same and stuck to the 1,000 packs of 55gr Game Kings (Super roo) as they just shot lights out.
They seem to work fine on most critters for me, but some blokes find them hard and report pencil throughs.
Often they will load the 55gr Hrdy pills for performance on varmints, but most agree that they just don't shoot as well as Sierra.

Sierra projies seem to be more consistent and always grouped tighter for me, the F-class targets proved it, and why so many of the top yank shooter use Berger projies.

I still shoot Hrdy ELDm on plates, but I weight sort any batches that seem inconsistent.

[MG5150]

Thanks guys!

Upon inspecting and measuring the clip-on adapter not only is the clamp crooked and not gripping evenly, it's also 78.4mm diamater but measured the scope at >78.mm so there is some wiggle room which means each shot can put the clip-on out my a tiny bit more. Not good

[Wapiti]

You don't leave the adaptor on permanently once it's tightened to the scope?
There will always be some tolerance difference between the scope diameter and the clamp when loosened off, or it will never fit.
At any rate, that shouldn't make the POA shift, because the scope and the crosshairs in it haven't been changed when taking on/off the clip-on.

At least, not a problem I've had even when swapping the same clip-on between different rifles, all with different adaptors. Zero shouldn't change.

[Fester]

In case you are new to it all, first checks are always all the mounts are secure.

The action screws can sometimes also work loose.

A big name night vision scope had problems holding zero when it was all becoming the rage.