7mmSaum test fire

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30-10-2019, 07:48 PM
Tahr

1 Attachment(s)

7mmSaum test fire

Took the new 7mm saum out today for a sight in, pressure test and formative load development. 100 yards.

Top left Fed Fusion 160grn and 2217 in 1 grain increments. Top right Fed Fusion 160grn and V100 in 1 grain increments. Bottom, Federal TBT 160 grn and V100 in 1 grain increments.

The odd pulled shot but there is a nice theme going on there. One very slight ejector stamp mark at .5 grn over book max with 2217. Chronograph tomorrow and am expecting 2950 fps (22" barrel).

The wind had got up for the bottom TBT test.

Attachment 123065
30-10-2019, 07:50 PM
Gibo

You missed with every shot! Send it back ;)
30-10-2019, 07:57 PM
7mmsaum

68g of 2217 and any projectile from the stunning 150NBT to 162 ELD-X and your good to go
30-10-2019, 08:02 PM
Tahr

Quote:

Originally Posted by 7mmsaum

68g of 2217 and any projectile from the stunning 150NBT to 162 ELD-X and your good to go

@7mmsaum 67.5 grn 2217 was the ejector stamp mark load. 67 was fine. Brand new brass though. But 67.5 and 67 were touching.
30-10-2019, 08:02 PM
Mooseman

Looking good, you taking it south with you?
30-10-2019, 08:03 PM
Tahr

Quote:

Originally Posted by Mooseman

Looking good, you taking it south with you?

Hope to. Shame you not coming.
30-10-2019, 08:03 PM
Mooseman

Try some Fairy Dust (RL 26 ) if you have some.
30-10-2019, 08:06 PM
Tahr

Quote:

Originally Posted by Mooseman

Try some Fairy Dust (RL 26 ) if you have some.

Do have, but have to work up a load and data and don't really have time. Ive got 5x pots of it, its my go to in 270wsm.
30-10-2019, 08:07 PM
25 /08 IMP

I found I hit pressure with 2217 too early and then went to RL22 but I would use RL26.

Sent from my CPH1903 using Tapatalk
30-10-2019, 08:08 PM
Mooseman

Quote:

Originally Posted by Tahr

Hope to. Shame you not coming.

Yes it would have been a great trip, haven't hunted with Rod for many years and it would have been a good time to catch up with you and Brian. I thought I better see my mum for her 91 st birthday as she isn't getting any younger. Definitely another time would be great.
30-10-2019, 08:10 PM
Micky Duck

what does Tilly think of the new smoke pole????
is it going to give you any advantage over the wsm???
or is it just another itch to be scratched.......
30-10-2019, 08:12 PM
quadhunter260

@Tahr ya will have got as many rifles as knives soon 😁😋 🤣
30-10-2019, 08:13 PM
Tahr

Quote:

Originally Posted by Mooseman

Yes it would have been a great trip, haven't hunted with Rod for many years and it would have been a good time to catch up with you and Brian. I thought I better see my mum for her 91 st birthday as she isn't getting any younger. Definitely another time would be great.

Understood. I had dinner with Rod and he explained. We have got 4k hectares to chase wallaby's on and then onto the Tahr :) A bit of topic I'm sorry.
30-10-2019, 08:14 PM
Tahr

Quote:

Originally Posted by Micky Duck

what does Tilly think of the new smoke pole????
is it going to give you any advantage over the wsm???
or is it just another itch to be scratched.......

Just an itch. Tilly loved it because it meant another outing :)
30-10-2019, 08:17 PM
Tahr

Quote:

Originally Posted by quadhunter260

@Tahr ya will have got as many rifles as knives soon ��

Thats soooo silly. I have 40 knives and only 6 centre fire rifles: .223, 7/08, 6.5x55, 270wsm, 7mm saum, 300 saum. :)
30-10-2019, 08:18 PM
chainsaw

Looks very promising. You got to be pleased with that result.
Like you I started with 2217 in SAUM but recently started playing around with RL23 and N560 cos sweet spot with 2217 in model 7 SAUM was down around 2880 fps (22in bbl).
Ladders with RL23 and 160TMKs 59gn - 61.5 gn at 2975fps and pressure good, no head stamp or ejector marks, bolt lift sweet, so could go a bit higher.
And ladder with 162AMAX and N560 61gn 2900fps, 61.5 2953fps faint head stamp, 62 gn stickie bolt.
So next step is shoot some groups with RL23 and try some RL26, hoping to get closer to 3000fps but anywhere north of 2950 with tight wee group would be nice.
30-10-2019, 08:20 PM
Mooseman

@Tahr what twist rate is your barrel? The Tikka 695 I swapped for my old Rem has a near new T3 barrel and it doesn't seem to like the 162 gr bullets, my son's T3 is the same both 7mm Mag. The 150 gr ELDX is looking better.
30-10-2019, 08:51 PM
Tahr

Quote:

Originally Posted by Mooseman

@Tahr what twist rate is your barrel? The Tikka 695 I swapped for my old Rem has a near new T3 barrel and it doesn't seem to like the 162 gr bullets, my son's T3 is the same both 7mm Mag. The 150 gr ELDX is looking better.

8.7:1
30-10-2019, 08:53 PM
Tahr

Quote:

Originally Posted by chainsaw

Looks very promising. You got to be pleased with that result.
Like you I started with 2217 in SAUM but recently started playing around with RL23 and N560 cos sweet spot with 2217 in model 7 SAUM was down around 2880 fps (22in bbl).
Ladders with RL23 and 160TMKs 59gn - 61.5 gn at 2975fps and pressure good, no head stamp or ejector marks, bolt lift sweet, so could go a bit higher.
And ladder with 162AMAX and N560 61gn 2900fps, 61.5 2953fps faint head stamp, 62 gn stickie bolt.
So next step is shoot some groups with RL23 and try some RL26, hoping to get closer to 3000fps but anywhere north of 2950 with tight wee group would be nice.

@chainsaw Yes, 2950 and tight groups is what Im looking for.
30-10-2019, 08:55 PM
Kudu

Are you going on another old farts Tahr hunt?
30-10-2019, 08:57 PM
Tahr

Quote:

Originally Posted by Kudu

Are you going on another old farts Tahr hunt?

Brian and me. Yes, we are old farts alright :)
30-10-2019, 09:01 PM
Shearer

Quote:

Originally Posted by 7mmsaum

68g of 2217 and any projectile from the stunning 150NBT to 162 ELD-X and your good to go

+1 for the 150NBT.
31-10-2019, 02:19 PM
Tahr

So the results are in.

62.5 grn R26 (starting load, mild) 2,873fps .75" - 3 shot group 160 Sierra Tipped Target

67 grn 2217 (.5 grn under ejector stamp load) 2,859fps - .5" 3 shot group - 160 Fed Fusion

59.5 grn Hybrid 100V (.5 grn under ejector stamp load) 3,009fps - .5" 3 shot group - 160 Fed Fusion

All seated @20 thou.

So the Hybrid 100V wins hands down and I will now load a batch to validate a drop chart.
31-10-2019, 03:08 PM
chainsaw

Nice !! that Hyb100V goes real well in short magnums :thumbsup:
31-10-2019, 05:20 PM
outdoorlad

Nice work, so Tahr you wont be needing all that Re26 then......:D
31-10-2019, 06:07 PM
Tahr

Quote:

Originally Posted by outdoorlad

Nice work, so Tahr you wont be needing all that Re26 then......:D

I use it in my 270wsm. I have 5 tubs of it. :)
31-10-2019, 08:27 PM
Tentman

Interesting results - the CZ 7x64 that I've just traded back to @nor-west gets 2820 fps with 53.4 grains of powder with the Sierra 160gn projectile and the same sort of accuracy (from a 24" barrel it has to be said). It'll run at 2950 fps but that isn't in a node so accuracy suffers a bit at the higher speed . . . .
01-11-2019, 05:37 PM
Spitfire

Quote:

Originally Posted by Mooseman

@Tahr what twist rate is your barrel? The Tikka 695 I swapped for my old Rem has a near new T3 barrel and it doesn't seem to like the 162 gr bullets, my son's T3 is the same both 7mm Mag. The 150 gr ELDX is looking better.

Interesting. My T3 based .284 Win with 162 ELD-X does .7 MOA 5 shots with an ex 7-08 T3 barrel at 2740 with 2213SC.
01-11-2019, 06:24 PM
Tahr

Quote:

Originally Posted by Tentman

Interesting results - the CZ 7x64 that I've just traded back to @nor-west gets 2820 fps with 53.4 grains of powder with the Sierra 160gn projectile and the same sort of accuracy (from a 24" barrel it has to be said). It'll run at 2950 fps but that isn't in a node so accuracy suffers a bit at the higher speed . . . .

Yeah, @Tentman the 280/7x64 is superbly efficient. I use 6 more grains of powder to get 3k but do have the advantage of a 22" barrel and a 5lb 10oz rifle. I like light and quick.

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