300 PRC 181 HAMMER

[700Sendero]

Been looking for some 181 hammer data for 300 PRC and can't seem to find much for loads with Retumbo, so I thought I'd share. Ended up at 84.5 gr of Retumbo in lapua brass. 3.565 OAL and 3100 fps. Shot a .385 at 100 from a factory Bergara wilderness ridge. Anyone else using something close to this combo?

 

[6.5saum/300rum]

I just started with the same bullets and brass in mine two weekends ago. I tried rl23, rl26 and h1000. Rl23 and h1000 were showing that they should be the most accurate and got 3100fps out of them. Rl26 was around 3200fps. I was working up in .3 grain intervals to find pressure so not really sure how good it will group yet but found a good node with both at 3100. Mine is a proof research 24" 1-9 twist but it was brand new to start this so it might speed up a little. I was using cci 250's

 

[GLTaylor]

Been looking for some 181 hammer data for 300 PRC and can't seem to find much for loads with Retumbo, so I thought I'd share. Ended up at 84.5 gr of Retumbo in lapua brass. 3.565 OAL and 3100 fps. Shot a .385 at 100 from a factory Bergara wilderness ridge. Anyone else using something close to this combo?

700Sendero,
Please add bbl length, twist and primer used. I'll post your info. Thanks

 

[Slick8]

If that holds up at distance I don't believe you'll need to look any farther.

I'm going to load the 199s in my 30 nos in the spring and i was thinking 82-84 would do it.

 

[700Sendero]

Bergara Wilderness Ridge 300 PRC 24" 1-9
181 Hammer Hunter
Lapua brass
Fed 215M
84.5 Retumbo
3.565 COAL
3100 FPS
Bolt lift as smooth as butter

 

[hardcoreoutdoorsman]

Bergara Wilderness Ridge 300 PRC 24" 1-9
181 Hammer Hunter
Lapua brass
Fed 215M
84.5 Retumbo
3.565 COAL
3100 FPS
Bolt lift as smooth as butter

I have a Gunwerks Nexus in 300 PRC, twist is 1-9, if use Gunwerks brass how close to your load as far as grains of powder of the Retumbo do you guess i would be at?

 

[LocalJW]

I've got a 22" seekins.

Just ordered the 182gr hammer for my 300prc.

Any ideas on where to start

I've got N570, RL26, N568, H1000

 

[6.5saum/300rum]

I've got a 22" seekins.

Just ordered the 182gr hammer for my 300prc.

Any ideas on where to start

I've got N570, RL26, N568, H1000

Are you going for max velocity or just accuracy?
Personally I shoot the 182 tipped hammers over h1000 it's 3150fps with a 24" barrel.

 

[LocalJW]

Are you going for max velocity or just accuracy?
Personally I shoot the 182 tipped hammers over h1000 it's 3150fps with a 24" barrel.

Accuracy! Looking to hit an MOA at 1000

 

[6.5saum/300rum]

Accuracy! Looking to hit an MOA at 1000

I haven't shot mine further than 600 yards yet. The wind always seems to be blowing a lot when I planned to. This was the last two shoots I fired at 600 yards they were less than 3/4" apart.

 

[LocalJW]

Dang.

Ya I usually do 600 yard ladder test in .5 increments. Look for 2-4 shots in a row that hit with in a 3/4 MOA on relatively same levels.

Then I'll seat depth. Just trying to find like starting powder ranges for these.

Currently I shoot 82 gr of n570 with Berger 205s

 

[6.5saum/300rum]

I worked up from 82-86 grains of h1000. I settled on 84.3

 

[LocalJW]

I worked up from 82-86 grains of h1000. I settled on 84.3

How did you settle on 84.3? Like what was your steps

 

[6.5saum/300rum]

I had a flat spot in velocity from 84-84.5 grains and 86 was definitely building pressure and I like to be at least one grain under that. I was only able to shoot 100 yards the day I did it and 83-85 were all touching as well.