Heym 89b 450/400

[Kevin Peacocke]

Hi All, has anyone chrono'd Hornady factory 450/400 400 grain ammo in their Heym please?
Thanks, KP

 

[Aussie_Hunter]

I haven't put factory Hornady 450/400 rounds over a chrono but I have put Hornady factory 375H&H and 458 Lott DGX ammo over a chrono. The 375H&H ammo was only just under the advertised velocity out of the 23" barrel of my RSM and the 458 Lott ammo was actually above the advertised velocity of 2300fps out of my Kimber Caprivi 24" barrel, it averaged 2330fps. Hornady definitely don't cheat you out of powder that's for sure.

 

[Kevin Peacocke]

Please can anyone let me know actual velocity of factory ammo even if it isn't fired from a Heym?

 

[Kevin Peacocke]

I see Hornady quotes 2050 fps out of a 24" test barrel. So what might be reasonable out of my 26" Heym barrel, 2080fps?

 

[WillMFerguson]

I have a Ruger No. 1 450/400 coming in a week, with 2 boxes of Hornady. I'll chrono the factory loads and send you the info. I'll put a reminder on my calendar.

 

[Kevin Peacocke]

I have a Ruger No. 1 450/400 coming in a week, with 2 boxes of Hornady. I'll chrono the factory loads and send you the info. I'll put a reminder on my calendar.

Thank you Will.

 

[Kevin Peacocke]

Ok, some feedback from my range session today with my Heym 89b 450/400. Using all Hornady 400grain DGX, VV N565
85gr 2015fps
87 gr 2049fps
88gr 2078fps
90gr 2130fps

The 85 grain L and R touched at 75 metres. Loads higher than that diverged.
Esoteric junkie chrono'd some factory Hornady 450/400 DGX bonded 400 grain for me and got 2000fps out of a 24" barrel. These are what my double was regulated with so it is probably reasonable that factory ammo would achieve 2015 out of a 26" barrel, hence the sweet spot I found.

 

[Frank375]

You have found your load.Stop monkeying with it.

 

[Kevin Peacocke]

You have found your load.Stop monkeying with it.

Agreed

 

[Frank375]

By the way,if I could have any double I wanted ,it would be an 89b.

 

[YancyW]

Ok, some feedback from my range session today with my Heym 89b 450/400. Using all Hornady 400grain DGX, VV N565
85gr 2015fps
87 gr 2049fps
88gr 2078fps
90gr 2130fps

The 85 grain L and R touched at 75 metres. Loads higher than that diverged.
Esoteric junkie chrono'd some factory Hornady 450/400 DGX bonded 400 grain for me and got 2000fps out of a 24" barrel. These are what my double was regulated with so it is probably reasonable that factory ammo would achieve 2015 out of a 26" barrel, hence the sweet spot I found.

Touching at 75m is about as close to perfect you will ever get, that's the winner.

 

[AZDAVE]

Kevin you may want to also try aframes. I have found in about 70% of the doubles I have shot them in that they group best about 40-60fps faster than the hornaday DGX or DGS's.

 

[Garrett89]

Any pics of your 89B? I'm picking out wood for mine in a couple weeks

 

[Kevin Peacocke]

Kevin you may want to also try aframes. I have found in about 70% of the doubles I have shot them in that they group best about 40-60fps faster than the hornaday DGX or DGS's.

Thanks Dave, I'll see if I can locate some.

 

[Kevin Peacocke]

Any pics of your 89B? I'm picking out wood for mine in a couple weeks

Sure, here you go.

By the way,if I could have any double I wanted ,it would be an 89b.

feel exactly the same way, they are perfection.

 

[Kevin Peacocke]

Here are the pics Garrett.

 

[JPetroni]

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

 

[Rare Breed]

Here are the pics Garrett.
View attachment 520887View attachment 520888View attachment 520889

Simply beautiful!!!

 

[WAB]

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

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!

 

[Tanks]

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!

Heym does a good job on the mount and the cutout at the rib for the red dots.