Heym 89b 450/400

Kevin,
Sounds like you have the real deal in the accuracy department, congratulations.
For what it’s worth and I know you fretted over it but the effort and cost you went through to get the dot sight and mount exactly right was well worth it. looks really good as well !!!

JP
Thank you JP.
 
I have to second that. I am not a fan of red dots on doubles. Too often they stick up in the air like some weird appendage. Yours is mounted extremely well, and does not detract from the aesthetics at all. Well done!
Thanks WAB.
 
Please can anyone let me know actual velocity of factory ammo even if it isn't fired from a Heym?
Sorry I'm late to the party, but six Hornady factory DGX fired from my 24" barrelled Jeffery boxlock averaged 1998 fps, with a high of 2033 and a low of 1967. They had not yet achieved convergence at 50m distance.

But it sounds like you have already found your best handload.
 
Sorry I'm late to the party, but six Hornady factory DGX fired from my 24" barrelled Jeffery boxlock averaged 1998 fps, with a high of 2033 and a low of 1967. They had not yet achieved convergence at 50m distance.

But it sounds like you have already found your best handload.
Thank you Troubleshooter, yes I think the sweet spot for me is 2015fps.
 
Kevin I have to say, the proportions 'c that frame on your 450/400 make the 89B .. the Gross Box on the 500 throws me off a bit. Just my opinion. Sorry has no bearing on the thread or the 89, with all due respect.
 
Sorry for the late reply Kevin, I've only just noticed your question. My Merkel 140AE 450-400 3" with 60 cm barrel (approx. 23.5") shooting Hornady factory loads averages between 2000 fps ( at 5°c) and 2080 fps. (at 30°C) AND there is a consistent difference of about 20 fps between the right and left barrels. Shoots good consistent groups from both barrels despite that difference in velocity on hot or cold days.
Glad you found a load that regulates well. Happy Hunting!
 
I see Hornady quotes 2050 fps out of a 24" test barrel. So what might be reasonable out of my 26" Heym barrel, 2080fps?

Congrats on having a 26" barrel. I think you're spot on, 30fps every two inches is the rubric I always use.
 
Sorry for the late reply Kevin, I've only just noticed your question. My Merkel 140AE 450-400 3" with 60 cm barrel (approx. 23.5") shooting Hornady factory loads averages between 2000 fps ( at 5°c) and 2080 fps. (at 30°C) AND there is a consistent difference of about 20 fps between the right and left barrels. Shoots good consistent groups from both barrels despite that difference in velocity on hot or cold days.
Glad you found a load that regulates well. Happy Hunting!
Thank you @Longwalker, appreciated.
 
Excellent. That’s the Heym mount?
 
Kevin, love that Heym of yours nice piece of wood as well.
Regulated for 75m is superb!!!
Now to stock up on powder and bullets while you have the load and there is stock.
 
Love that rifle and almost positive I have settled on the caliber as the best suited, well rounded for a double rifle that will see far more plains game annually than buffalo or elephant. Called Chris today to talk about timing... seeing yours Kevin only fuels the fire!
 
Love that rifle and almost positive I have settled on the caliber as the best suited, well rounded for a double rifle that will see far more plains game annually than buffalo or elephant. Called Chris today to talk about timing... seeing yours Kevin only fuels the fire!
 

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Currently doing a load development on a .404 Jeffrey... it's always surprising to load .423 caliber bullets into a .404 caliber rifle. But we love it when we get 400 Gr North Fork SS bullets to 2300 FPS, those should hammer down on buffalo. Next up are the Cutting Edge solids and then Raptors... load 200 rounds of ammo for the customer and on to the next gun!
To much to political shit, to little Africa :-)
Spending a few years hunting out west then back to Africa!
mebawana wrote on MB_GP42's profile.
Hello. If you haven't already sold this rifle then I will purchase. Please advise. Thank you.
jbirdwell wrote on uplander01's profile.
I doubt you are interested in any trades but I was getting ready to list a Sauer 404 3 barrel set in the 10-12 price range if your interested. It has the 404J, 30-06 and 6.5 Creedmoor barrel. Only the 30-06 had been shot and it has 7 rounds through it as I was working on breaking the barrel in. It also has both the synthetic thumbhole stock and somewhere between grade 3-5 non thumbhole stock

Jaye Birdwell
 
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