Load problems maybe?

[bushwackr]

Hi all

I just got a new rem m700 7mm stw. I loaded a few rounds just to try it out. The first shot felt good, I went to remove the spend round and it wouldn't extract. When I got it out it wouldn't extract after firing also. My load is a mellow load

New unfired nolser brass
74gr imr7828ssc
Fed 215 GM primer
speer 160gr #1637 loaded to 3.530" according to speer manual

fired brass very hard to chamber (it wont), new stuff and the other loaded round is like butter.
I am at a loss, I dont know what to think. Any suggestions, this is the first time I have ever had a issue with handloads. Maybe chamber proplem with the rifle?

 

[Nimrod]

Where did you find the data ? I checked my Speer data and it lists Remington brass, CCI 250 primer starting at 72 grains with IMR 7828, no data for the SSC version.

Sounds like pressure problems to me, the 215 is a pretty hot primer and Remington brass may have more capacity than Nosler.

Bob

 

[justgoto]

New unfired nolser brass
74gr imr7828ssc
Fed 215 GM primer
speer 160gr #1637 loaded to 3.530" according to speer manual

My Hornady 7th Edition manual has that charge weight above max load with regular IMR7828.

 

[bushwackr]

Yep my manual says start at 72 , 76 max. I guess ive always used the 215 match magnum primers. I figured i run mid weight charge and says to use magnum primers. It was also -10 Deg so I sure wouldnt think that I would run into pressure issues. As for the powder, I was told that the only diffrence in the reg vs ssc powder is that it meters better thru a measure.

 

[bushwackr]

My Hornady 7th Edition manual has that charge weight above max load with regular IMR7828.

yep I just looked at that myself it shows 73.4 max well why does the speer book call for so much

 

[bushwackr]

ok now I looked at the sierra manual and it shows for a 160 gr 70.8 start to 76.3 max thats on a boat tail bullet not sure what that matters besides case volume. With 7828 not the ssc

 

[Barrelnut]

The Speer, Hornady, and Sierra bullets probably have different bearing surface lengths and that affects pressure. Loads from different manufactures 160 gr bullets is not an apples to apples comparison

 

[bushwackr]

Well I'm sure that it is not my reloads. I went and loaded up 2 rounds with diffrent powder lowest load show, first was 75gr h1000 case stuck, second was 66gr of H4831sc that case stuck also. So I assume its the rifle. I think im going to have to head to a smith.

 

[556]

A few years back i had a similar issue with a 7mm Rem Mag. My problem ended up being a simple cartridge length issue I missed trimming a few cases and when fired I would experience sticking bolt/hard extraction etc. I believe you have new brass so this maybe a moot point.