What velocities we're you seeing at 60 and what grain bullets
I was shooting 166 gr A-Tips. Figures aren't in front of me but it was not up to speed yet. According to Quickload data around 60 was about top but it had a way to go yet. I'm thinking it was around 2700-2800. Should be able to get 2900 with that bullet. My RL-26 came in so I switched to that with a known load with hunting bullets. I intend to run a few rds with Magpro fairly soon. If the wind will ever go to a 0 influence.
It will be with 166 gr A-tips. I've been shooting them slow with RL 26 @2700. Super accuracy but slow. Looking to save the 26 for my GAP and use Magpro. Might test some tomorrow.
Well I got a bunch of speed checks today but really nothing on accuracy. 20 degrees and wind blowng 20-30 mph from about every direction at once. I shot a Magpro load of 63 grs x 166 gr A-Tip. CCI 250. Didn't check COL as basically speed only. That load averaged 2775 out of a 22" barrel.
I found some data from earlier that I ran last summer. 64.5 grs was 2860 fps and 65 grs was 2870 fps. Both with 166 gr A-Tip x CCI 250. I had the 64.5 load starred so it must have shot very well.
I also shot a H4831 SC load of 62 grs that ran 2920 fps. Hodgdon lists 63 as top charge but I will back it off a couple tenths and shoot for accuracy. I got a small swip on the case head. I think 2900 out of a 22" barrel is pretty decent. Someone had suggested H4831 SC before so I thought it was worth a shot. Looks good so far.
I found some data from earlier that I ran last summer. 64.5 grs was 2860 fps and 65 grs was 2870 fps. Both with 166 gr A-Tip x CCI 250. I had the 64.5 load starred so it must have shot very well.
I also shot a H4831 SC load of 62 grs that ran 2920 fps. Hodgdon lists 63 as top charge but I will back it off a couple tenths and shoot for accuracy. I got a small swip on the case head. I think 2900 out of a 22" barrel is pretty decent. Someone had suggested H4831 SC before so I thought it was worth a shot. Looks good so far.
Sure looks like it.
I was shooting a lot of plinker 168 classic hunter I got super cheap with h4831sc.
That was so pleasant to shoot out to 1500 and even further and it hammered.
N165 is there as well.
Last edited:
Were you using Std or mag primers?
Good deal. Got lots of those.
So what's the consensus with the Sierra 183gr as far as seating. I have a long action so mag length isn't an issue. Do sierras like to jump or be close to the lands. Never shot sierras before. Always berger or Hornady.
Thanks in advance
Doc
Thanks in advance
Doc
I got my best results with closer to the lands than I normally run.
I usually start at .020 off but the 183 seems like the old VLD’s.
Shot a couple 3 rd loads yesterday with H4831SC x 166 gr A-Tip. Wind was very minimal but mirage coming off the snow was horrible and certainly didn't help accuracy. 61.5 grs shot very well considering how shitty the conditions were, I managed to drop a couple in the same hole. That was with mag primers so now to test mag vs std and run a short ladder at distance. Thanks for the recommendation.
So here's the current pieces together. Just waiting on the barrel now.
And one in case some of you can't imagine what a barrel looks like
Doc
And one in case some of you can't imagine what a barrel looks like
Doc
Good looking blunderbuss.
Dude where can I get that brake?So here's the current pieces together. Just waiting on the barrel now.
And one in case some of you can't imagine what a barrel looks like
Doc
if u spin the tuner around it'll reduce recoil as well
The carbon buildup in that tuner smells differentNot a brake, just a new barrel tuner that I invented
Doc
Looking for some input on how to get my new saum barrel chambered. It's on a tikka action so can go a little longer. For now I have a stash of 180g hybrid targets but would like to be able to run heavier bullets down the road too. How much freebore should I ask the Smith to add?
There are more knowledgeable 7 SAUM experts on here, but from what I've gathered, the consensus seems to be 0.180" freebore if you want to go anything more than SAAMI standard 0.090". Going with this much freebore is best done with a longer action which you seem to have in the Tikka. I'm putting one together using a Mausingfield long action and 0.180" is the freebore I'm going to see if my gunsmith can support.
Some really useful information here. Thinking of a Tikka Super Varmint in 6.5 PRC to eventually convert to 7mm SAUM. Looks like it will have enough space to accommodate the 7 SAUM with the heavy bullets. As long a the bolt face is correct I don't think it matters which T3X you use?
I've shot both and 7 Saum is quite a bit better in my opinion. You won't go wrong. And I like the 6.5 Saum/Gap better as well.
That's good to know. The 6.5 PRC would just be the donor given that it's not easy to get parts and build a rifle over here. I could get a custom built but that would be a lot more expensive up front, not sure I'm that patient!
Correct, the donor action doesn't matter. You will just have to run the correct bolt stop and mags.
New 7SAUM build......
MPA LH Competition chassis
ARC Nucleus Lefty LA 30MOA rail
27" Preferred barrel 1/8 twist .090 Freebore
Area 419 Sidewinder Brake
Timney 2 Stage trigger
Atlas Bipod
F3R Machine scope mount
Vortex PST Gen2 5-25
MPA LH Competition chassis
ARC Nucleus Lefty LA 30MOA rail
27" Preferred barrel 1/8 twist .090 Freebore
Area 419 Sidewinder Brake
Timney 2 Stage trigger
Atlas Bipod
F3R Machine scope mount
Vortex PST Gen2 5-25
Been neglecting my 7 saum
Switched out the 338 barrel for the 7 mm barrel yesterday.
Such a fantastic cartridge
Shot it from 530 to 2020 yards today.
190 LRHT with R26 at 2850.
This barrel is starting to slow down after 1500ish rounds just like my last barrel.
I’ll make one or two powder adjustment’s then retire it.
Switched out the 338 barrel for the 7 mm barrel yesterday.
Such a fantastic cartridge
Shot it from 530 to 2020 yards today.
190 LRHT with R26 at 2850.
This barrel is starting to slow down after 1500ish rounds just like my last barrel.
I’ll make one or two powder adjustment’s then retire it.
Mind sharing your CBTO/COAL and charge weight with RL 26?
3.09
59.5 R26
Federal 210m
Adg brass On it’s 20th firing.
I loaded this ammunition 11 months ago, sd was a bit higher than normal at 9 for 10 shots.
59.5 R26
Federal 210m
Adg brass On it’s 20th firing.
I loaded this ammunition 11 months ago, sd was a bit higher than normal at 9 for 10 shots.
My 7 saum is going out past 1000 next week for the first time. Have a place to shoot out to 2200, 300 Norma going as well.
Nooooooo... Don't retire it rebarrel an keep the 7 SAUM Master Race going... If we don't keep it alive the PRC, Creedmoor, GT, BR, Lapua World wins
I already chambered a fresh barrel for it a while back.Nooooooo... Don't retire it rebarrel an keep the 7 SAUM Master Race going... If we don't keep it alive the PRC, Creedmoor, GT, BR, Lapua World wins
29” heavy Palma bartlein
7 saum is now my primary lil gun cartridge for bolt guns
Good if you go to something else who will I completely wear out for information on 7 SAUM
What freebore are you running? Also, what BCs have you found line up with 183s and 190s? I know it depends, but I won't have a chance to really stretch my 7ss out and verify dope before a match this weekend
Finally getting mine out on Sunday. Will have pics and such. Loaded up 100 rds of a middle weight charge of MagPro under 183, 180 and 197gr pro all 20ths off lands. Get all brass fire formed to my barrel. Then load dev time.
Doc
Doc
What action length are you running with?
Oops, never mind, see a LA
LA with .090 Freebore. If I find that not enough I'll have my smith bore it out to .100-.120
Doc
Ended up switching to 180berger hyb with N560. I run this in an origin short action 2.96oal. 61gr N560, Gunwerks brass, fed 210M.
Caliper should be moved out slightly. Noticed after I took pic
Caliper should be moved out slightly. Noticed after I took pic
Has ADG brass shipped and I missed out? I had an order in with Creedmoor Sports, but they didnt know if I would get filled or not. I could have sworn ADG was hoping to ship 7SAUM brass in March.
I got the email from Manners 2-3 weeks ago and paid for my stock, just waiting on shipment. The only thing I need for this build now is brass... sort of important, lol.
I got the email from Manners 2-3 weeks ago and paid for my stock, just waiting on shipment. The only thing I need for this build now is brass... sort of important, lol.
Last edited:
Great velocity there in a short action! Pretty much on par with 26. What’s your barrel length?
