Need some reloading help

[Bigeclipse]

Redding makes a set of shell holders pre-ground to accomplish this. Sometimes if it only needs a little more setback, more cam-over will do it. Was fire forming for 243AI and one lot of brass needed this to properly chamber.

I resized 20 more cases of the once fired brass, trimmed to length and then without any bullets, primers or powder loaded, chambered them in my rifle. Low and behold 15 chambered easy, 3 medium and 2 wouldn't chamber at all. I then measured the 3 medium and 2 no-go pieces of brass and they definitely were a bit longer in the shoulder. I tried lowering the die but it is max depth with camover and there was no change in shoulder bump so it seems I need to get the redding set. Do you know what redding set fits 28nosler by chance?

 

[Bigeclipse]

I think that it is possible that your necks are just a touch longer than the chamber. This would account for the hard bolt close, and puts a slight crimp on the bolt. This would drive up pressure, which drives up velocity. Also, it is possible for the case to shrink in length if it is tight on headspace dimension. As the case expands it 'bulges' slightly, and reduces the overall length.

This is pretty easy to check by taking the outside dimension of a case right at the tip of the neck, and then chamber it, and then take the measurement again. Could be a brass length issue, or potentially even the neck portion of the chamber is cut a little short. I would say that there is a better chance that it is the former, and not the latter.

This could be true as I only checked a handful of the neck lengths. so I will check this.

 

[Tiny Tim]

Redding Competition Shellholder Set #6 (7mm Remington Mag 300

The Redding Compeition Shellholder Kit #6 consists of five shellholders in varying heights with increments of .002". Allows you to increase or...

www.midwayusa.com

Not sure if 300 WM and 28 Nosler have same rim, but I think so.

 

[Tiny Tim]

If you only need .003, maybe you can place a .003 feeler gauge under the case head in the shell holder to get it further into the die.

 

[Bigeclipse]

Redding Competition Shellholder Set #6 (7mm Remington Mag 300

The Redding Compeition Shellholder Kit #6 consists of five shellholders in varying heights with increments of .002". Allows you to increase or...

www.midwayusa.com

Not sure if 300 WM and 28 Nosler have same rim, but I think so.

ok to confuse things worse....The two loads I shot yesterday were 3209fps and 3220fps. These were 79 grains and 79.2 grains. 79.2 grains I got a nice ejector mark, with stiff bolt lift, cratered primer and I could feel the load was a stout load. Here is where I am confused. Today to check everything everyone was saying, I resized the brass, picked out all the ones that chambered well in my chamber, retrimmed going .010 shorter than before AND seated the bullets .010 deeper, which in theory now I am .030 off the lands instead of .020. I loaded up a 79 grain and a 79.2 grain load. Shot them both. NO ejector marks. No stiff bolt lift and no cratering. Basically no signs of pressure BUT the velocities matched yesterday. I got 3206 on the first shot and 3219 on the 79.2 grain load. So one of the things i did obviously changed something lol but now I don't know what haha. What I am confused at even more so is that whatever I did must have lowered the pressure and typically lower pressure means lower velocity. I am now wondering if maybe that shot that had the extreme pressure signs yesterday had something wrong with the load. Bullet not seated deep enough, case not trimmed so it pinched the bullet. Time to pull all the bullets and start over.

 

[Tiny Tim]

Ugh. That's frustrating!

 

[jdyoung]

I resized 20 more cases of the once fired brass, trimmed to length and then without any bullets, primers or powder loaded, chambered them in my rifle. Low and behold 15 chambered easy, 3 medium and 2 wouldn't chamber at all. I then measured the 3 medium and 2 no-go pieces of brass and they definitely were a bit longer in the shoulder. I tried lowering the die but it is max depth with camover and there was no change in shoulder bump so it seems I need to get the redding set. Do you know what redding set fits 28nosler by chance?

Redding #6 Competition Shellholder set

 

[jdyoung]

ok to confuse things worse....The two loads I shot yesterday were 3209fps and 3220fps. These were 79 grains and 79.2 grains. 79.2 grains I got a nice ejector mark, with stiff bolt lift, cratered primer and I could feel the load was a stout load. Here is where I am confused. Today to check everything everyone was saying, I resized the brass, picked out all the ones that chambered well in my chamber, retrimmed going .010 shorter than before AND seated the bullets .010 deeper, which in theory now I am .030 off the lands instead of .020. I loaded up a 79 grain and a 79.2 grain load. Shot them both. NO ejector marks. No stiff bolt lift and no cratering. Basically no signs of pressure BUT the velocities matched yesterday. I got 3206 on the first shot and 3219 on the 79.2 grain load. So one of the things i did obviously changed something lol but now I don't know what haha. What I am confused at even more so is that whatever I did must have lowered the pressure and typically lower pressure means lower velocity. I am now wondering if maybe that shot that had the extreme pressure signs yesterday had something wrong with the load. Bullet not seated deep enough, case not trimmed so it pinched the bullet. Time to pull all the bullets and start over.

that shot that had the extreme pressure signs yesterday
Did you mark that cartridge and/or separate it from the rest ?

 

[aushunter1]

Your die is not set up correctly, its not about your COAL or your brass lenght/trimming lenght.

Before the shoulder is bumped the case stretches & if the die is not turned down enough the shoulder does not get bumped enough.

There is sometimes the need to slightly over cam your die set up but if you need to overcam to the point where there is a danger of braking the press the yes get some redding competition shell holder set

You need to get yourself a comparator!

 

[jdyoung]

aushunter1 wrote: You need to get yourself a comparator!
He has a Hornady set

 

[Bigeclipse]

that shot that had the extreme pressure signs yesterday
Did you mark that cartridge and/or separate it from the rest ?

Yes I did.

 

[Bigeclipse]

Your die is not set up correctly, its not about your COAL or your brass lenght/trimming lenght.

Before the shoulder is bumped the case stretches & if the die is not turned down enough the shoulder does not get bumped enough.

There is sometimes the need to slightly over cam your die set up but if you need to overcam to the point where there is a danger of braking the press the yes get some redding competition shell holder set

You need to get yourself a comparator!

I have one. I set the die to cam over 100% and it still wasn't enough on some of the pieces of brass. I wonder if I have a tight chamber?

 

[jdyoung]

I have one. I set the die to cam over 100% and it still wasn't enough on some of the pieces of brass. I wonder if I have a tight chamber?

Do you have any pieces of brass that you are absolutely sure is fireformed and not resized in any way ?

 

[338 dude]

I resized 20 more cases of the once fired brass, trimmed to length and then without any bullets, primers or powder loaded, chambered them in my rifle. Low and behold 15 chambered easy, 3 medium and 2 wouldn't chamber at all. I then measured the 3 medium and 2 no-go pieces of brass and they definitely were a bit longer in the shoulder. I tried lowering the die but it is max depth with camover and there was no change in shoulder bump so it seems I need to get the redding set. Do you know what redding set fits 28nosler by chance?

The competition shell holder set will actually lengthen the case meaning less sizing while still remaining in contact with your die you need more sizing