Howdy Folks, I was hoping someone could help me out with the .308 Winchester for Sierra MatchKing Boat Tail Hollow Point 30 Cal 168 Grain Model: 2200 Load data. Its been awhile I guess but I thought I remember being able to download load data from their website but I can't find any.
I have the Hornady and Lyman load data books but wanted to take a gander on what Sierra was saying. Thank is advance!
Bill
Attachment 104275
Here you go
Hi Jim, Thank you for your help. The link took me to an odd site, definitely not a Sierra site. Noticed though, the data is for 30-06, not 308Win.Quote:
Originally Posted by browningautorifle
Just before I got your message I did find it on AccurateShooter in the Serria308Win.pdf
Thank again!
Thank you Jonzie :)Quote:
Originally Posted by Jonzie
Anytime glad to help
You do not need bullet maker specific data. Loading is done by the bullet weight.
Data from every source/manual will be slightly different anyway. Load data in manuals reflect averages of all the loads tested using a given powder, with the exact components, test barrel length/rifling twist and environmental conditions on the day of the test.
For example, Hodgdon's site used a 168 grain Sierra HPBT bullet for the tests on their site. The Start load was 41.5 of IMR4064, giving 2518 FPS, out of a 1:12", 24" barrel. Your .pdf claims 39.7 grains of IMR4064 gave 'em exactly 2500 FPS out of a 1 in 10, 26" barreled Savage 12VSS. With no Start or Max load at all. Who's right? They both are. Different tests.
I wouldn't use that Sierra .pdf data though. Far too vague. Not that it's unsafe though. It's just not complete.
Oh and I used IMR4064 in my example because it works really, really well with 168 grain Match bullets in either .308 or .30-06.
Hi Sunray, I am aware that I don't need maker specific data, I was just curious as to what Serria load data was saying. I just bought my son a Mauser with a 1:11 twist 22" barrel 308W and since I have only loaded for 1:10 and 1:12 longer than 22" barrels I wanted to compare loads (also puled data from Vihtavuori, Hodgdon, and Alliant). I did note that all Serrias numbers were the furthest off when compared but they used a 26" barrel as well.Quote:
Originally Posted by Sunray
I'm looking for a starting load that will fully burn in a 22" barrel and gives 'good' results out to 300 as I work uploads. Thank you for the help and the IMR4064 recommendation.
How fast do you want to go?
My "tree-ware" Sierra manual, 5th edition, 2003, lists a lot of loads, one of which uses good-old 3031. The test rifle was a Savage 12VSS, 26", 1:10" twist.
39.5 grains of 3031 got them to 2600 FPS and with "normal" pressure. 41.1 gn of 3031 is listed as MAX.
TWO reasons for that, I suspect: Pressure signs on the fired brass and the fact that it gets fairly tricky to get that amount of powder in a .308Win case and then stuff in a long-ish bullet and seat it such that it will run through all magazines. AND fit the throat of a "standard" .308 chamber. I also suspect the 155 Palma was invented to specifically work within the constraints o the .308Win / 7.62 NATO ammunition AND rifle specifications. Also, be aware that some of the longer, "slinkier" bullets may NOT stabilize sufficiently when fired from a 1:12" twist .308 Win, because even in a 26" barrel, the muzzle velocity achievable may not provide a sufficient spin rate.
The 168gn Sierra in a .30-06 can be safely driven to 2800 fps with a variety of powders.
Barrel length, chamber throating, case capacity, etc. all come into critical play when you start trying to "push the envelope".
Consider reading a little more carefully, noting each page includes -Quote:
https://www.milsurps.com/images/tact...quote_icon.png Originally Posted by Sunray https://www.milsurps.com/images/tact...post-right.png . . . With no Start or Max load at all. . .
I wouldn't use that Sierra .pdf data though. Far too vague. Not that it's unsafe though. It's just not complete. . .
Quote:
INDICATES MAXIMUM LOAD – USE CAUTION
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED.
I saw that and tried in vain to correct it...Quote:
Originally Posted by usabaker