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Chasing the lands is stupid... What do you think?

dgeesaman said:
I think his method has plenty of validity.

But nothing I’ve seen has invalidated the other methods.

I guess I’m surprised that nobody has taken this data before. It’s not hard. Or if you have a barrel that’s not precious, just do a full seating depth work up every couple hundred shots and see if you can follow the node. Then compare that to the touch or hard jam length at each work up. Compare the data over the life of the barrel.

David
Click to expand...

Maybe someone already has, and has decided to share it with you all... ;)
 
Alex Wheeler said:
I like to have the extra data. I can get my touch point to the .001" every time, its quick and easy so I do it. If the gun stops shooting and the throat did not move, then Im going to look at some other reason why. If you dont know if the throat has worn or not then you are working blind and you may get lucky moving the seating depth or you way waste a day at the range. To each his own.
The point I was making was that if the correlation between the ogive of the bullet and the touch point do not relate to accuracy then there would be no point in knowing that distance or maintaining it. We all know seating depth is critical, but why exactly I do not know. Its not just exit timing.
Click to expand...

It’s not working blind actually. Once seating depth node has been established, it can only move one way. Out. If rifle quits shooting and you have been keeping up with testing as I suggested in video, then you know something is wrong. Rifle should never be out of tune because it will always be tested on target, and no changes will ever be made without verification as it’s done when chasing lands.

I also know seating depth is important, which is why in the video I talk about how I test seating depth for accuracy.
Only place we disagree is that I do not move my bullet out blindly without testing on target. And if I shoot on target and my gun is shooting as expected, but upon measuring lands it tells me I’m supposed to move, I don’t move. I trust the target more than I trust the lands movement.
That’s about as clear as I can explain it.
 
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I can't believe this debate is still going on. Can't we just say whatever works for you and leave it at that. We are only looking for a datum to start seating depth test from.

Personally i am a hard jam guy. I shoot benchrest and usually just start load workup right there. Only one way to go on my seating depth test from there.

With my hunting rifles I start at mag length. Only one way to go from there. I find the berger seating depth test can cut out a lot of testing with those rifles.
 
Erik Cortina said:
Maybe someone already has, and has decided to share it with you all... ;)
Click to expand...
So we agree it will remain unsubstantiated.

I spent enough time watching the video, I probably won’t research chasing the lands data. Maybe I’ll generate some data on my own, as I go through my current barrel, since one persons data is never conclusive.

David
 
Lefty Trigger said:
What a lot of people dont realize is that the lands dont just wear/erode evenly its at a progressive angle. Think of it as a funnel that gets longer, its still the same size funnel but now its longer and at a steeper angle.
Click to expand...
It is not just the damage getting longer. The damage/roughness gets more severe. The bullet has to ride on this damage.
 
Somewhere, as this topic is being discussed, there is probably some 13 year old girl shooting highpower rifle, standing on her hind legs, putting them all in the 10 and X ring with a borrowed rifle, ammunition and equipment, with no clue about what all of this is about.

Danny
 
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As a 1000yd BR shooter, if you are not maintaining a consistent jam or jump. You are going home early. I’ve seen very few tuners in 1.450 barrels. Most do not even use brakes. The work is usually done at home in your reloading room, rifle on the rests and bolt stripped. Every case is checked for Head space and seating depth checked. It’s pretty much standard procedure.
 
Erik, I liked the video, though the method of always being off jamb to avoid a stuck bullet applies significantly more to the PRS crowd than to bench rest folks whom tend to shoot with as little tension as possible. If loading from a magazine, one MUST use significantly more neck tension than bench rest just to keep the bullet from moving during the "stripping and chambering" process. That extra tension is what causes the bullets to stick in the first place when seated long.

Switching to the bench rest discipline, many shoot at jamb and utilize SIGNIFICANLY less neck tension, often combined with the use of moly or HBN, and a stuck bullet is rarely an issue, especially during a match. The nature of soft-seat is such that I don't need to "chase the lands", as each time I load a round into the chamber, the depth is adjusted automatically. One maintains seating depth for the life of the barrel or until the load starts to shoot poorly - which will result in barrel replacement if high-round count - or a tweak in powder. To purposefully, and always avoid jamb for fear of sticking a bullet, then needing to chase the lands just isn't an issue for those loading a single-shot rifle. It may prevent the very best the rifle has to offer form ever seeing daylight.

Your practices are very sound for PRS, though a lot of viewers might get the impression that to shoot at jamb is to be avoided. If you had prefaced the video as to apply to magazine-fed rifles, you would have far fewer "non believers". Still - thanks for the time to make and present a generally educational video!
 
WIB3 said:
As a 1000yd BR shooter, if you are not maintaining a consistent jam or jump. You are going home early. I’ve seen very few tuners in 1.450 barrels. Most do not even use brakes. The work is usually done at home in your reloading room, rifle on the rests and bolt stripped. Every case is checked for Head space and seating depth checked. It’s pretty much standard procedure.
Click to expand...
FWIW, I've tested my tuners on 1.450 straight barrels and you might be surprised how little difference there is with it, as opposed to say a 24" HV.
 
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