December $487 prefit group buy, several barrels are a go

[Lawnboi]

The beauty of the Ackley Improved is that the datum line in the same point on a .223 shoulder, so it is load and go. It will chamber and fire any ammo.

The jump should not be an issue. As throat wear, the jump can be enormous. As in a post above, one bullet was entirely out of the case without touching the throat. That means it was floating in space after leaving the neck and before hitting the throat.



I would choose .100 for my personal rifle. I want accuracy from the 77-80 grain bullets. And ability to load the 88 but not plan on optimizing for them.

The lighter bullets in bulk ammo might have to jump, but any effect on accuracy are swallowed in the fact it is bulk ammo for practice.

And, it is my experience jumping doesn’t matter too much.

For reference, the SAAMI for 22 creed is .081 throat for their vermint up to 80 grain. We sell the .120 throat to load the longer bullets in the 85+ category. Accuracy is indistinguishable shooting handloads and factory 80 ELDm.

This is exactly why I don’t need too long of throat, it would force me to one or two long hearing surface bullets.

I’m fine with .062 or .100. I can make either work. I’d rather have y bullet pushed deeper than making a massive jump to the rifling.

 

[hereinaz]

Ill take 100. 120 would be ideal. I think people think jumping bullets is a bigger deal than it actually is.


I plan to fire form the same way. Won't be an issue

Agree on all points, .120 is best for 80-90 but .100 is workable and volume shooting planned with a .223 for most Rokslider’s purposes will push the throat out.

Jump analysis is over complicated fuddlore benchrest mythology. Eric Cortina sets a load and shoots it. He has videos on not chasing the lands.

 

[hereinaz]

This is exactly why I don’t need too long of throat, it would force me to one or two long hearing surface bullets.

I’m fine with .062 or .100. I can make either work. I’d rather have y bullet pushed deeper than making a massive jump to the rifling.

I am also following with you here. I don’t plan on huge jump to start, simply because it will grow. And most will be shooting the 75-80 else why a fast twist. A few will shoot the 88 and it is doable.

It looks like the .100 throat is the compromise and consensus, but willing to hear everyone out.

 

[wyosam]

This might be another potential problem to a longer freebore. Still have to fire form. I’ll make whatever work only because I know I’ll be100% hand loading and can just jam them.

Doesn’t matter if they are chambered right. They headspace the parent case on the neck/shoulder junction. No need to jam bullets.


Sent from my iPhone using Tapatalk

 

[Gstew1930]

.100 is good with me

 

[Lawnboi]

I am also following with you here. I don’t plan on huge jump to start, simply because it will grow. And most will be shooting the 75-80 else why a fast twist. A few will shoot the 88 and it is doable.

It looks like the .100 throat is the compromise and consensus, but willing to hear everyone out.

I’m good with .100(or close to)

 

[HuntHarder]

.100 it is. Works for me

 

[Jmedin]

I would prefer .100 a little more room to play with