GoosePilot
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- Feb 3, 2018
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I have a 7 blaser improved
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Designing My Last 7mm Cartridge
- Thread starter BoatTail
- Start date
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BoatTail
Well-Known Member
Can you tell me what velocities you are getting? I found this in another thread on the 7mm Blaser Mag. The numbers seemed high. That is why I'm trying to ensure my drawings are correct to pull into both Quickload and Gordon's reloading tool to run my own.
| 7MM Blaser Mag (Unvalidated) Load Data (Possible Quickload Data) | ||||||
| Bullet (grains) | Powder | Charge | COAL | Projected FPS | Bbl Length | Twist |
| Hornady 162 A Tip | Vihtavuori N570 | 77.8 | 3.3 | 3181 | 26 | 1:8.25 |
| Hornady 162 A Tip | Alliant Reloder-33 | 81.4 | 3.3 | 3168 | 26 | 1:8.25 |
| Hornady 162 A Tip | Hodgdon Retumbo | 76.8 | 3.3 | 3147 | 26 | 1:8.25 |
| Hornady 162 A Tip | Alliant Reloder-26 | 70.3 | 3.3 | 3112 | 26 | 1:8.25 |
| Berger 175 EOL | Alliant Reloder-26 | 71 | 3.3 | 3151 | 26 | 1:8.25 |
| Berger 175 EOL | Alliant Reloder-26 | 70.5 | 3.3 | 3129 | 26 | 1:8.25 |
| Berger 175 EOL | Alliant Reloder-26 | 70 | 3.3 | 3108 | 26 | 1:8.25 |
| Berger 175 EOL | Alliant Reloder-26 | 69.5 | 3.3 | 3071 | 26 | 1:8.25 |
| Bergert 195 EOL | Alliant Reloder-26 | 70 | 3.42 | 3047 | 26 | 1:8.25 |
| Bergert 195 EOL | Alliant Reloder-26 | 69.5 | 3.42 | 3007 | 26 | 1:8.25 |
| Bergert 195 EOL | Alliant Reloder-26 | 69 | 3.42 | 2990 | 26 | 1:8.25 |
| Bergert 195 EOL | Alliant Reloder-26 | 68.5 | 3.42 | 2960 | 26 | 1:8.25 |
BoatTail
Well-Known Member
I actually like my 7mm WSM. I have a longer Freebore and with RL26 and a 162 gr ELD-X get 3133 out of a 25" barrel. They key seems to be having the right powder for the case. Here is what Alliant Powder shows as capable with RL26 and the 7mm WSM. I could not reach those velocities without reaching pressure signs first.
I think I still have some 7lrm brass somewhere to check h20 capacity. If you were getting 3100fps with a 180 you must have had a 26+ barrel and pushed it hard. I had two 7lrms both with 24" barrels and they were 2980-3000fps with 180's.
BoatTail
Well-Known Member
Yes my 7 LRM was built by Gunwerks and had a #5 fluted 26" barrel. We shot a lot of Antelope with it but I didn't like the way the 180 VLD's performed on Antelope. Since they weren't very wide, the bullet came apart exiting the offside leaving a huge hole and damaging a lot of meat. For Elk the VLD's were probably good. I never used it for that back then though. It may have been under 3100 fps. That was a long time ago and i deleted my load data.
BoatTail
Well-Known Member
Does anyone have load data for the 7mm Blaser Mag or AI version of that cartridge? This is the closest cartridge to what I would like to build. I need to validate what I think this wildcat can do.
Bghunter338
Well-Known Member
BoatTail
Well-Known Member
Thanks
Bghunter338
Well-Known Member
That came out blurry here is the link.
7 MM BLASER MAGNUM | Reloading Data for hand loading
www.norma-ammunition.com
BoatTail
Well-Known Member
With this information, I think I'm going to order the reamer. I think I can reach my goal of more performance than the 7mm PRC & 7mm WSM but less than the 28 Nosler. I have the action and a new Proof barrel.
Monterey21
Well-Known Member
I have a Serb Mauser with Lilja 3 groove 9 twist chambered with my 7 Blaser reamer. The latest loads are 70.5 of H1000, 150 Barnes TTSX 215M @3220. 24" barrel. This barrel is a re-chambered barrel. Consistent under an MOA mostly .5. I think this is the next step up from the 7SAUM. I have a 28N and unless you are going to use the 180-195 bullets the 7Blaser is the better choice.
BoatTail
Well-Known Member
Interesting! I have two (2) 28 Noslers that are tac drivers (3/8" or less) but I don't need that much performance or bullet weight anymore. I don't Elk hunt anymore due to my health limitations thus my interest in a Blaser Hybrid. Thanks for the info.
GoosePilot
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My last messing with loads was after I shot my bull elk and just over 100 rounds on 24" 8 twist proof cf.
H1000 f215
195 eol
67.0gr was 2810 - 71.0 was 2946. There was a node at 2920 and 2840. I shoot 68.3gr and 2840 (now that I'm suppressed that load is running 2890)
180 hybrid
67.0 gr was 2752fps - 73.0 gr was 3090 and heavy bolt. Had a good easy node at 70.5 and 2991
175 elite hunter
68.0 waa 2867 - 73.0 was 3101 with heavy bolt. Had a good easy nide at 70.5 and 2966
Did a quick attempt with retumbo but at least at that time it didn't net much more easy speed. I still felt 2920fps node was pushing more than I cared for.
Rich Sherman's 7 max is very similar. If I remember correctly when I spoke with him most guys were using a 26" and were 80-100fps faster. Also n570 i believe netted another 100fps or so maybe it was more
H1000 f215
195 eol
67.0gr was 2810 - 71.0 was 2946. There was a node at 2920 and 2840. I shoot 68.3gr and 2840 (now that I'm suppressed that load is running 2890)
180 hybrid
67.0 gr was 2752fps - 73.0 gr was 3090 and heavy bolt. Had a good easy node at 70.5 and 2991
175 elite hunter
68.0 waa 2867 - 73.0 was 3101 with heavy bolt. Had a good easy nide at 70.5 and 2966
Did a quick attempt with retumbo but at least at that time it didn't net much more easy speed. I still felt 2920fps node was pushing more than I cared for.
Rich Sherman's 7 max is very similar. If I remember correctly when I spoke with him most guys were using a 26" and were 80-100fps faster. Also n570 i believe netted another 100fps or so maybe it was more
GoosePilot
Well-Known Member
- Joined
- Feb 3, 2018
- Messages
- 400
My earliest 195 eol reloading shot 5 rounds in a 5" group at 1000 yards so I just haven't worried about doing much more load development. Have shot it to 1204 a handful of times.
