Custom Sizing Die Maker for SAUM clickers?

[RabbitSlayer]

I run a SAUM with ADG brass. I’m curious what powder, bullet and charge weight you were using.

I established my own reamer and changed the dimension at the 200 line to 0.5520. SAAMI is 0.5510. This is the secret sauce.

I have 1000 cases. All have been fired once. Most have been fired twice. All with 62.0 - 63.0 grains of H1000 and a 180 Hybrid without a single clicker or heavy bolt lift to speak of.

I had clickers from the get go basically. I have long freebore and I am running at over 3.1 coal. I don't have my notes handy. N565 berger 190 LHT. Book max is 60.4 at 2795 26" barrel and 2.876 coal. I got this data from berger. I started with 12 pieces for load development.

I began in the lands approx 0.015 with 57 gr, velocity was way low assumed due to the long coal.

Then 58 gr

At 59 grains I had 3 clickers. Velocity was 2650 from a 27" barrel.

I thought maybe it was being in the lands causing pressure. I went .020 off and tried 59 again. Every single one a clicker.

I had never had a clicker. I thought maybe it was pressure, but only resistance was at the top of bolt lift, velocity was so slow, primers nice and round. A member here who has been helping me get started with the SAUM helped confirm it is due to the tight chamber and hard adg brass. He went through the exact same troubles.

I learned the hard way with another rifle to work with a small amount of brass for all the initial load development and try to get 5 + cycles on it. For that gun i was on the third loading of 250 pieces when there was catastrophic failure and I had to toss them all.

 

[Willow]

I run a SAUM with ADG brass. I’m curious what powder, bullet and charge weight you were using.

I established my own reamer and changed the dimension at the 200 line to 0.5520. SAAMI is 0.5510. This is the secret sauce.

I have 1000 cases. All have been fired once. Most have been fired twice. All with 62.0 - 63.0 grains of H1000 and a 180 Hybrid without a single clicker or heavy bolt lift to speak of.

That powder around 62gr from my own testing resulted in a very easy bolt lift with ADG brass. It did however produce fliers and the accuracy was not there so it disappeared quickly. With ADI2213sc (H4831sc), I get fantastic accuracy from 2880 up to 2940fps...bolt lift however is definitely harder, but no clickers - I did spec my reamer at .5522 at the .200 line. I do wonder whether the tougher ADG brass makes the re-sizing process a bit harder compared to Norma...

 

[JackWolfKnives]

I had clickers from the get go basically. I have long freebore and I am running at over 3.1 coal. I don't have my notes handy. N565 berger 190 LHT. Book max is 60.4 at 2795 26" barrel and 2.876 coal. I got this data from berger. I started with 12 pieces for load development.

I began in the lands approx 0.015 with 57 gr, velocity was way low assumed due to the long coal.

Then 58 gr

At 59 grains I had 3 clickers. Velocity was 2650 from a 27" barrel.

I thought maybe it was being in the lands causing pressure. I went .020 off and tried 59 again. Every single one a clicker.

I had never had a clicker. I thought maybe it was pressure, but only resistance was at the top of bolt lift, velocity was so slow, primers nice and round. A member here who has been helping me get started with the SAUM helped confirm it is due to the tight chamber and hard adg brass. He went through the exact same troubles.

I learned the hard way with another rifle to work with a small amount of brass for all the initial load development and try to get 5 + cycles on it. For that gun i was on the third loading of 250 pieces when there was catastrophic failure and I had to toss them all.

My best guess is that your brass and your chamber are not playing nice together. So I would consider changing one or the other. I don’t think this has anything to do with the loads you were shooting. You can now see in these comments that two of us who modified our 200 line dimension are having success with ADG brass. If you don’t want to throw out your brass and try Norma, then look into how to modify your chamber. Just my .02.

 

[SKWERLZ]

A new die seldom solves the root problem. It's an easy fix. More predictable than, Maybe a new die will solve my problem.

^^^^

Fixing the barrel is a better solution.

 

[RabbitSlayer]

That powder around 62gr from my own testing resulted in a very easy bolt lift with ADG brass. It did however produce fliers and the accuracy was not there so it disappeared quickly. With ADI2213sc (H4831sc), I get fantastic accuracy from 2880 up to 2940fps...bolt lift however is definitely harder, but no clickers - I did spec my reamer at .5522 at the .200 line. I do wonder whether the tougher ADG brass makes the re-sizing process a bit harder compared to Norma...

It took 62 gr to reach the book max velocity. Accuracy for a 20 shot group is about .6. Considering I shot that from a caldwell stable table with a bipod, I think its shooting pretty good. It was hammering last weekend at 1100.

I guess im going to deal with clickers the rest of the season then pull the barrel and send it off. My life goal for a year has been to try 2 miles, and I have about 5 months before its 115 degrees every day to do it.