Help with problem measuring lands

[cw308]

Once you know the distance from the closed bolt to the lands , that measurement doesn't change overnight.

 

[Pigdog]

Make sure you run a patch through before firing. One never knows when a splinter may fall off and remain in your barrel. I wish I had posted as you did. I ruined a perfectly good Dewey rod pushing the bullet back into the chamber.

Thanks, I haven't even checked the threads on my boretech rod they are probably stuffed now too!!!! I woulda done it at least 20 times with that rod pushing a bullet out will check that when I get home.

 

[mike06]

Here is another option.
I have added some more illustrations of the LTL Gauge to help answer the question "how does this thing work?". People also ask "why is this better than the Hornady gauge or the stripped bolt method?" Here are some of the reasons;

• The brass is mechanically locked in the chamber instead of held by hand.
• The bullet stops against the lands by means of an adjustable clutch mechanism not by "feel" such as pushing on a rod or closing the bolt.
• Measurements are taken identically to your loaded ammo with the calipers centered and square to the case head.
• No bolt disassembly/reassembly or extractor modifications required.
• No need to repeatedly move the case from the rifle to the seating die.
• Consistency. Repeatability. Adjustability. Accuracy.

As always more information can be found on the Dead Center Sports website.
Thanks for your interest,
Mike

I have the LTL Tool and it is very precise and quick saves a bunch of time.

 

[cw308]

Pigdog
Soft seating your bullets are sticking in the rifling . You must be using a bushing die . Use a standard neck die , it will have more tension , when seating long at first your bolt should not close . It does take some time lowering the bullet slightly in the die and chambering each time , once it chambers with a slight resistance then you can color the bullet with a marker until you reach your zero . Record that measurement to seat for jump or jam , also check every 500 rounds for wear . Some benchrest shooters soft seat with a neck tension of.001 when a jam shoots best in their rifle.

 

[Olde Man]

Alex's method for sure. Strip your bolt. No shortcuts. When you start to close your bolt and you can see that it is going to force the bullet into the lands stop and take the bullet out and shorten it up about .005 and try it again. There is no need to jam it into the lands. When your bolt handle goes about 1/2 way down shorten the it up by .002. When the bolt handle is all the way down shorten by .001. Before you put your bolt back together repeat the process with any other bullet you plan to shoot. This works very well for me.

 

[bigstick6017555]

Best yet,Alex Wheeler's videos are free, and you save money on unneeded gadgets. Guess folks just do not know how to take down a bolt.

 

[fguffey]

Alex's method for sure. Strip your bolt. No shortcuts. When you start to close your bolt and you can see that it is going to force the bullet into the lands stop and take the bullet out and shorten it up about .005 and try it again. There is no need to jam it into the lands. When your bolt handle goes about 1/2 way down shorten the it up by .002. When the bolt handle is all the way down shorten by .001. Before you put your bolt back together repeat the process with any other bullet you plan to shoot. This works very well for me.

Or use all of the bullet hold you can get, forget tension because reloaders can not measure tensions, I started with tension gages and deviation gages, I have know from the beginning tension gages do not measure in tensions and I know there is no conversion that converts tensions to pounds.

F. Guffey

 

[fguffey]

Wait, what?

moondog, I have said before; this stuff is not for everyone, some of this stuff drives reloaders to the curb. SO, what is it that you do not understand and then there is that other problem I have to consider; many reloaders have a lot of growing up to do.

F. Guffey

 

[moondog]

moondog, I have said before; this stuff is not for everyone, some of this stuff drives reloaders to the curb. SO, what is it that you do not understand and then there is that other problem I have to consider; many reloaders have a lot of growing up to do.

F. Guffey

Wait, what?

 

[Dusty Stevens]

Most reloaders except me and guffey

 

[KenOath]

A smith called to explain to me he had built 4 magnificent rifles, he did all of the work, he made the 7MMM Wildcat reamer, he had help making the dies from a genius of a gunsmith.

One of the rifles shot like a shotgun as in patterns and the other three shot one hold groups. He gave ever smith he knew a chance to help him; mothing.

He called to ask me where I would start so I gave him enough information to get lost because he went straight the to the reloading forums. Someone sold him on the ideal I was talking about the stick and drawing/scribing lines. It was not long before he called me to explain he was more confused that when he started.

He brought the rifle to me without the reamer, he claimed he broke it. I used a simpler method that requires less time. After preparing his cases I used the heavies/longest 7MM bullets I had, the bullets weighted 200 grains.

During the test I pushed the bullet out of the case and into the throat, the bullet traveled down the throat and finally hit the rifling. I have 64 chamber reamers, I have access to 240 more. I could not find a reamer long enough to clean up his chamber meaning he had to move the barrel back or start with another barrel.

I understand how difficult it is for reloaders to keep up but there was no way I could make a transfer. When he returned home he said he could not find the tools we used on the Internet. I explained to him we made the tools before we tested the length of his chamber from the rifling at the end of the throat to the bolt face.

F. Guffey

You are a little entertaining.... sometimes!! And sometimes you make some sense...but not this time, atleast not to me!

 

[KenOath]

Or use all of the bullet hold you can get, forget tension because reloaders can not measure tensions, I started with tension gages and deviation gages, I have know from the beginning tension gages do not measure in tensions and I know there is no conversion that converts tensions to pounds.

F. Guffey

Whatever you may use it’s a reference point, it really doesn’t matter what the actual pressure, pounds,tension etc is, just move it up or down from the reference point you have until it shoots small.....Some like to be above, some like to be below, some like to be close and some like to be far from the reference point before they shoot small...but eventually you will find a place that shoots smaller than all the other places....

Hope that wasn’t to simple for ya.

 

[moondog]

View attachment 1069765


Most reloaders except me and guffey

That's back when I had hair!

 

[JFrank]

Or use all of the bullet hold you can get, forget tension because reloaders can not measure tensions, I started with tension gages and deviation gages, I have know from the beginning tension gages do not measure in tensions and I know there is no conversion that converts tensions to pounds.

F. Guffey

How many bullet holds should I set my bullet hold gage to ?
Just curious