7 saum and 145gr lrx

[Badseed]

Ive been looking for some load reference points for the 7 saum and barnes 145gr lrx but haven’t had much luck. The barnes load data sheet for the saum is circa 2007 so it doesn’t have any updated information for the mono bullets or newer powders.

Im running a medium length action and have h1000, n560, and h4831sc powders on hand. Does anyone have load data they can share?


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[wind gypsy]

I have loaded the 145 CEB lazers over 58.x h4350. That’s in a long throated chamber.

 

[Derrickson]

I shoot the 145 lrx out of my SAUM with 57.0g and get on average 3050fps. It is a short action. I basically used a regression line based on the 140 and 150 and plugged in 145 for the grain weight. If you figure out using VV N560, let me know as I would be interested. One point of reference for hammers is on this link.

7 SAUM data 145 HHT 131 HH

Hey all, I put together a Tikka T3x in 7 SAUM recently and started working on a couple loads. I thought I would reach pressure before the top end, but Im not seeing signs. I didn't notice any hard bolt lift (hard to tell though, first Tikka I've shot). Each group in the pictures is a 5 or so...

hammerbullets.com

 

[Badseed]

I shoot the 145 lrx out of my SAUM with 57.0g and get on average 3050fps. It is a short action. I basically used a regression line based on the 140 and 150 and plugged in 145 for the grain weight. If you figure out using VV N560, let me know as I would be interested. One point of reference for hammers is on this link.

7 SAUM data 145 HHT 131 HH

Hey all, I put together a Tikka T3x in 7 SAUM recently and started working on a couple loads. I thought I would reach pressure before the top end, but Im not seeing signs. I didn't notice any hard bolt lift (hard to tell though, first Tikka I've shot). Each group in the pictures is a 5 or so...

hammerbullets.com

What powder are you using? I will report my findings as soon as I get them.


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[Derrickson]

What powder are you using? I will report my findings as soon as I get them.


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Sorry, forgot to mention that. H4350.

 

[huckfin]

I was using H4831sc, ADG brass, 215 primers in a 24" proof barrel getting 3180 fps with those 145gr LRX, had them loaded out to max box length. . I will have to check my data but I believe I settle on 64.0 gr, HOWEVER I did have obvious PREASURE signs!!!! primers were flat as a pancake, slight ejector mark, I have changed things up since but it shot great. You would be fine starting at 56.0 grains and working up to find the pressure for your rifle/chamber/barrel.

 

[06 SB]

Have you looked at Hodgden's data? It does not give LRX data but does have loads for a 145 HPBT. The data gives you a good ball park to start. H4350 and H4381 provided virtually the same MV. As you said, Barnes data is not updated at all for the 7SAUM. In either case there is some guess work involved which is never fun in reloading. The two powders I listed are great powder and would think you could work up a good load with either one. I do not know if QuickLoad would be a good source for data. Do you know anyone that has that software?

 

[waspocrew]

I’m using 63 gr of H4831SC with the 145 LRX. ADG brass, Fed 215. 3021 fps out of my 20” barrel.

Used that combo to take 4 animals last season.

 

[Badseed]

I’m using 63 gr of H4831SC with the 145 LRX. ADG brass, Fed 215. 3021 fps out of my 20” barrel.

Used that combo to take 4 animals last season.

Thanks. Did you happen to test the 210m vs 215m’s? From my research it seemed like most people were getting more consistent load(es/sd) using large rifle primers, at least with the 7 saum. I know there is a general rule to use magnum primers when using more than 60 gr of power also so Im curious why you ended up with the 215s.


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[waspocrew]

Thanks. Did you happen to test the 210m vs 215m’s? From my research it seemed like most people were getting more consistent load(es/sd) using large rifle primers, at least with the 7 saum. I know there is a general rule to use magnum primers when using more than 60 gr of power also so Im curious why you ended up with the 215s.


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I never tried any of the 210s, just went straight to the 215s. I had very consistent results so never bothered to try a different primer. I don’t recall my ES off the top of my head, but that load shot well out to 800 yards, so I never chased it.

 

[wind gypsy]

Thanks. Did you happen to test the 210m vs 215m’s? From my research it seemed like most people were getting more consistent load(es/sd) using large rifle primers, at least with the 7 saum. I know there is a general rule to use magnum primers when using more than 60 gr of power also so Im curious why you ended up with the 215s.

I've messed with 210s and 215s in a couple 6.5 and 7 SAUMs. In general I seemed to have a little more consistent velocities with the LR primers but it wasn't night and day by any means and might not have even been a statistically significant comparison. 58-64 grain charges of 4350, 4831, RL26, h1000.

 

[TaperPin]

My sample sizes have had to be large or very low SD to see a difference in group size or the tiny bump in velocity going with a mag primer. There’s probably 10 fps more velocity, which just got hidden in the fog for the most part. I’m impressed when someone has real distinct results one way or the other.

I noticed H1000 load density for 175 gr bullets in the Nosler data for the SAUM is really high, like 110%, so that must be worse for lighter bullets.

The 7 SAUM and WSM should be much more popular - I have them on my Christmas list to Santa.