The wait begins

[b23]

You had a sticky/heavy bolt lift and ejector swipes at 66gr and you felt the need to not only increase the amount of powder but you shot more rounds as you continually increased the powder charge 4.5 more grains?

Once I get a clicker, heavy bolt lift, or ejector swipe I generally stop and depending on the case size drop the powder a half grain or so.  I'm struggling to understand why you continually increased the powder another 4.5 grains to 70.5 when you're getting clear pressure signs at 66. 

[callturner]

Mag primers are NOT required for that powder and for the charges and bullets your firing CAN cause excessive pressure. Max coal for that rifle in a factory gun is 2.860 . Not sure what he set it up for, did he tell you? I sent Speer info also but it didn't show up so: For 180 gr bullets they start at65.0 gr for 2780fps. MAX shows 69.0 compressed at 2906 fps. There coal runs 2.700 - 2.800 for 5 different bullets. Will this gun even take factory ammo? You seem to be having too many variables. A new gun should not be broke in with max loads anyway. Are you shooting across a crony? Good luck Daniel.

Mike

[jasnt]

Yes more jump will mean less pressure to an extent.  Back off, lower charge, get your brass fire formed.   Barrel should speed up and level off around 100 rds.   Hornady brass is soft but firing them should work harden them a bit.     Once all your brass is fired don’t bump shoulders till a fired case has some resistance chambering.  Can take 3 firings to fully fire form.  Then get serious about load development.  I often use cheap bullets for the first 100 to get brass fire formed.   This will give you better idea of chamber size and get you more familiar with the rifle aswell.   Jmo and how I treat a new barrel

Thanks for the info. I guess I just need to be more patient. I would use cheap bullets to fire form  but it’s chambered for 185gr VLD. Nothing else chambers in it.

I guess it’s time to back off the charge and load up the rest of the brass to fire form.

it’s throated for 185’s but should have no problems with 168’s.  If you can’t chamber anything else there is a problem

[dmoua]

You had a sticky/heavy bolt lift and ejector swipes at 66gr and you felt the need to not only increase the amount of powder but you shot more rounds as you continually increased the powder charge 4.5 more grains?

Once I get a clicker, heavy bolt lift, or ejector swipe I generally stop and depending on the case size drop the powder a half grain or so.  I'm struggling to understand why you continually increased the powder another 4.5 grains to 70.5 when you're getting clear pressure signs at 66.

Because it was rather sporadic. If it happened on the first shot of 66gr or almost every shot then I would have stopped but it didn’t. 70.5 had no pressure signs. I’ve had this issue before with a Model 7 action. You can fire ten rounds and it’ll cycle fine then jam on the next shot. Happened with factory ammo and hand loads that were near minimum, seated to SAAMI spec, and still had plenty of case volume.

[dmoua]

Yes more jump will mean less pressure to an extent.  Back off, lower charge, get your brass fire formed.   Barrel should speed up and level off around 100 rds.   Hornady brass is soft but firing them should work harden them a bit.     Once all your brass is fired don’t bump shoulders till a fired case has some resistance chambering.  Can take 3 firings to fully fire form.  Then get serious about load development.  I often use cheap bullets for the first 100 to get brass fire formed.   This will give you better idea of chamber size and get you more familiar with the rifle aswell.   Jmo and how I treat a new barrel

Thanks for the info. I guess I just need to be more patient. I would use cheap bullets to fire form  but it’s chambered for 185gr VLD. Nothing else chambers in it.

I guess it’s time to back off the charge and load up the rest of the brass to fire form.

it’s throated for 185’s but should have no problems with 168’s.  If you can’t chamber anything else there is a problem

It was initially throated for 215’s and I had issue’s chambering 185’s unless I shoved the whole bullet inside the case.

[dmoua]

Mag primers are NOT required for that powder and for the charges and bullets your firing CAN cause excessive pressure. Max coal for that rifle in a factory gun is 2.860 . Not sure what he set it up for, did he tell you? I sent Speer info also but it didn't show up so: For 180 gr bullets they start at65.0 gr for 2780fps. MAX shows 69.0 compressed at 2906 fps. There coal runs 2.700 - 2.800 for 5 different bullets. Will this gun even take factory ammo? You seem to be having too many variables. A new gun should not be broke in with max loads anyway. Are you shooting across a crony? Good luck Daniel.

Mike

66grs is not even close to max which is what I loaded and used for break in. My internal mag is 3” and he rethroated the barrel to 185’s with a max COAL of 2.960 if I remember right. Gonna have to look at my notes.

I did shoot with a chronograph and posted the results above in one of my posts.

[jasnt]

Yes more jump will mean less pressure to an extent.  Back off, lower charge, get your brass fire formed.   Barrel should speed up and level off around 100 rds.   Hornady brass is soft but firing them should work harden them a bit.     Once all your brass is fired don’t bump shoulders till a fired case has some resistance chambering.  Can take 3 firings to fully fire form.  Then get serious about load development.  I often use cheap bullets for the first 100 to get brass fire formed.   This will give you better idea of chamber size and get you more familiar with the rifle aswell.   Jmo and how I treat a new barrel

Thanks for the info. I guess I just need to be more patient. I would use cheap bullets to fire form  but it’s chambered for 185gr VLD. Nothing else chambers in it.

I guess it’s time to back off the charge and load up the rest of the brass to fire form.

it’s throated for 185’s but should have no problems with 168’s.  If you can’t chamber anything else there is a problem

It was initially throated for 215’s and I had issue’s chambering 185’s unless I shoved the whole bullet inside the case.

i remember that part.  But you should be able to load up smaller bullets seated a little shorter bto and chamber those.   The 125gr sst’s Are cheap and short and great for ff brass in 30 cal.  I think they are about $20 a 100ct.   I’ve shot about 500 185 vld’s in my 300.  The 125’s and even most of the 168’s are shorter bto


Did you go with Shawn’s +p throat? Reason I ask is it’s easy to be jammed or close to it with out realizing due to the longer taper and less resistance entering the lands. 
How does a fired case feel chambering?

[dmoua]

Yes more jump will mean less pressure to an extent.  Back off, lower charge, get your brass fire formed.   Barrel should speed up and level off around 100 rds.   Hornady brass is soft but firing them should work harden them a bit.     Once all your brass is fired don’t bump shoulders till a fired case has some resistance chambering.  Can take 3 firings to fully fire form.  Then get serious about load development.  I often use cheap bullets for the first 100 to get brass fire formed.   This will give you better idea of chamber size and get you more familiar with the rifle aswell.   Jmo and how I treat a new barrel

Thanks for the info. I guess I just need to be more patient. I would use cheap bullets to fire form  but it’s chambered for 185gr VLD. Nothing else chambers in it.

I guess it’s time to back off the charge and load up the rest of the brass to fire form.

it’s throated for 185’s but should have no problems with 168’s.  If you can’t chamber anything else there is a problem

It was initially throated for 215’s and I had issue’s chambering 185’s unless I shoved the whole bullet inside the case.

i remember that part.  But you should be able to load up smaller bullets seated a little shorter bto and chamber those.   The 125gr sst’s Are cheap and short and great for ff brass in 30 cal.  I think they are about $20 a 100ct.   I’ve shot about 500 185 vld’s in my 300.  The 125’s and even most of the 168’s are shorter bto


Did you go with Shawn’s +p throat? Reason I ask is it’s easy to be jammed or close to it with out realizing due to the longer taper and less resistance entering the lands. 
How does a fired case feel chambering?

I see, I’ll have to look into a cheap option for break in then. But no I did not go with the +p option. A fired case that jammed will get stuck when chambering, one that cycled fine when firing has no issue chambering. Bolt is hard to close. This has been the case with everything I shot loaded 0.015” off the lands.

Going to try backing off and see when it will let me close the bolt without having to fight it.

[jasnt]

Can you drop a bullet in a fired case or is there some resistance slipping bullet in fired case?

[dmoua]

Can you drop a bullet in a fired case or is there some resistance slipping bullet in fired case?

It has resistance. I measured the neck after firing and it had about 0.006” expansion.

[jasnt]

Sounds like you may have a tight neck chamber.  A bullet should just fall in the case.  If this is true you may need to neck turn to get rid of this pressure issues or use a different brand of brass.  Check multiple cases including those that did not have the pressure issues

[dmoua]

Sounds like you may have a tight neck chamber.  A bullet should just fall in the case.  If this is true you may need to neck turn to get rid of this pressure issues or use a different brand of brass.  Check multiple cases including those that did not have the pressure issues

I tried it with all the cases I fired yesterday. Even the one's that cycled fine, the bullet just sits on the neck. Some don't even let the bullet slide down when pushing it in by hand and some you can eventually wiggle the bullet into the spent casing. Somebody is hoarding all the Nosler brass  .

[jasnt]

Sounds like you may have a tight neck chamber.  A bullet should just fall in the case.  If this is true you may need to neck turn to get rid of this pressure issues or use a different brand of brass.  Check multiple cases including those that did not have the pressure issues

I tried it with all the cases I fired yesterday. Even the one's that cycled fine, the bullet just sits on the neck. Some don't even let the bullet slide down when pushing it in by hand and some you can eventually wiggle the bullet into the spent casing. Somebody is hoarding all the Nosler brass  .

Definitely sounds like tight neck chamber.  Looks like everyone is hoarding 300wsm brass.  Not easy to find any in stock except Winchester.   Do you have access to neck turning tools?

[dmoua]

Sounds like you may have a tight neck chamber.  A bullet should just fall in the case.  If this is true you may need to neck turn to get rid of this pressure issues or use a different brand of brass.  Check multiple cases including those that did not have the pressure issues

I tried it with all the cases I fired yesterday. Even the one's that cycled fine, the bullet just sits on the neck. Some don't even let the bullet slide down when pushing it in by hand and some you can eventually wiggle the bullet into the spent casing. Somebody is hoarding all the Nosler brass  .

Definitely sounds like tight neck chamber.  Looks like everyone is hoarding 300wsm brass.  Not easy to find any in stock except Winchester.   Do you have access to neck turning tools?

You might be right on the tight neck chamber. But no I do not. Guess I'll have to buy one now.  Any specific one to get?

[jasnt]

Sounds like you may have a tight neck chamber.  A bullet should just fall in the case.  If this is true you may need to neck turn to get rid of this pressure issues or use a different brand of brass.  Check multiple cases including those that did not have the pressure issues

I tried it with all the cases I fired yesterday. Even the one's that cycled fine, the bullet just sits on the neck. Some don't even let the bullet slide down when pushing it in by hand and some you can eventually wiggle the bullet into the spent casing. Somebody is hoarding all the Nosler brass  .

Definitely sounds like tight neck chamber.  Looks like everyone is hoarding 300wsm brass.  Not easy to find any in stock except Winchester.   Do you have access to neck turning tools?

You might be right on the tight neck chamber. But no I do not. Guess I'll have to buy one now. 

I’d contact Shawn again, let him know what issues your having and he may be able to help. Maybe even turn your necks to get you started and he will have more insight on the chamber specs of the reamer used.