Hammer Hunter Load Data, (See page 1, Post 8)

[GimpyPaw]

26" #4 7.5 twist Bartlein
Kelbly Nanook
TB UL7 Gen II
2.198 seating depth measure with Short Action Customs 30* shoulder insert
Lapua brass
Fed 210
57.9 grains N565
3180 fps

I'm sorry if I missed it, but what cartridge was this load for?

 

[Fotis]

Any 300 RUM loads with the 199?

 

[parshal]

I'm sorry if I missed it, but what cartridge was this load for?

6.5 PRC

 

[ncfireman83]

Steve's Opening Reminders:

The Hammer Hunter line is our long range or high bc line of bullets. This was the original line of bullets. These bullets all have 1.5mm hollow point and are typically 60%-70% weight retention. There is no drop off in terminal performance from the Shock Hammers. The only difference that we see on game is the Shock Hammer will open up slightly quicker. As time goes on we are learning that the extra shed weight of the Hammer Hunter is great aid in terminal performance with the several larger shed petals creating their own wound channels around the main retained shank wound channel. We designed the Hammer Hunter with the 1.5mm hp as it was the smallest that we could get reliable expansion. We tried 1mm hp but it would not always do what we wanted on game. Failure is not an option.

Our loading procedure: Always load with caution and never start with a stated max load from anyone or anywhere.

A reputable ammunition loading manual should be consulted for load development using a particular powder. Always follow good loading practices outlined in your loading manual. Our PDR design will tend to have less pressure due to less bearing surface contact with the bore. We recommend looking for a powder showing fairly high load density for similar weight bullets, but not compressed. We like to use powders that show a 90-95% load density with conventional bullets of the same weight. This will leave some room for the longer copper bullet and for the lower pressure possibly needing a bit more powder to get to pressure. We also recommend using a magnum primer to start ignition more quickly in order to seal the chamber as the bullet enters the bore. This is more important with larger cartridges and definitely magnum cartridges. Use of a chronograph to watch muzzle velocity compared to similar weight bullet velocity listed in loading manual will aid in load development. Muzzle velocity should not exceed max load velocity listed for similar weight bullets listed in loading manual. Muzzle velocity is an indication of pressure. Always watch for known pressure indicators such as heavy bolt lift or ejector marks on brass as well. We have found that Hammer Bullets are not sensitive to seating depth. Seating to mag length for repeating rifles or just off the lands will generally work very well without need to adjust for better accuracy. If we can reach the lands we like 20 thou off as a starting point.

Load development should be easy. Find your seating depth, choose your powder and primer, use start load data and work up your load to desired velocity, sight it in, and have fun hitting it with a Hammer.

OK, here is the Hammer Hunter Load Data I have.
Please review your loads. There is a bit of needed info missing


Post 9-18-2022
G

GLTaylor I'm having trouble with file not wanting to open

 

[GLTaylor]

GLTaylor I'm having trouble with file not wanting to open

You probably need to download the "Document Reader" app.

 

[ncfireman83]

You probably need to download the "Document Reader" app.

I got it figured out. Thanks

 

[JTH]

Loaded up some of the 6.5 mm 85 grain hammers in a Cooper 6.5 cm, 22" barrel 1/8 twist. Using Varget and starting with a seating depth of 2.635 OAL , here's the results:

41.0 - 3194
41.5 - 3222
42.0 - 3245 - Light ejector mark
42.5 - 3294 - Ejector mark
43.0 - 3335 - Ejector mark
43.5 - 3363 - Heavy ejector mark, primer flattening

All of these shot a little under moa at 100 yards.

Loaded three up at 41.3, averaged 3218 with ES of 27.5, grouped under 3/4 moa, will adjust seating depth to tighten up the groups next time out. I'm pretty impressed with these velocities out of a 22" barrel.

 

[GLTaylor]

Loaded up some of the 6.5 mm 85 grain hammers in a Cooper 6.5 cm, 22" barrel 1/8 twist. Using Varget and starting with a seating depth of 2.635 OAL , here's the results:

41.0 - 3194
41.5 - 3222
42.0 - 3245 - Light ejector mark
42.5 - 3294 - Ejector mark
43.0 - 3335 - Ejector mark
43.5 - 3363 - Heavy ejector mark, primer flattening

All of these shot a little under moa at 100 yards.

Loaded three up at 41.3, averaged 3218 with ES of 27.5, grouped under 3/4 moa, will adjust seating depth to tighten up the groups next time out. I'm pretty impressed with these velocities out of a 22" barrel.

JTH,
What primer and brass? Thanks

 

[eshorebwhntr]

270 Win 23.5" Hart 1-10"

New Norma brass FL sized, no expander ball.

85gr Shock Hammer, Varget, F215, 3.065 COAL

MagnetoSpeed

1. 56.0gr 3778
2. 56.5gr 3807
3. 57.0gr 3838
4. 57.5gr 3878
5. 58.0gr 3925
6. 58.5gr 3929
7. 59.0gr 3964 slight pressure
8. 59.5gr 3982 ejector
9. 60.0gr 4000 too hot
10. 60.5gr ----- didn't shoot

Going to load up 3x 57.7-58.7 and shoot for groups.

 

[JTH]

JTH,
What primer and brass? Thanks

Sorry. Brass is Petersen, primers are CCI BR2

 

[Seabeeken]

338 RCM, Ruger Alaskan, 20" Barrel, not sure of twist. 175 gr Hammer Hunter, COL 2.835" limited by mag length, A-2520 powder, CCI LR primer, Hornady brass. Went up to 59.5 gr and 2883 fps. Could easily have gone higher as no pressure signs. Grouped .3"

 

[JTH]

Loaded up some of the 6.5 mm 85 grain hammers in a Cooper 6.5 cm, 22" barrel 1/8 twist. Using Varget and starting with a seating depth of 2.635 OAL , here's the results:

41.0 - 3194
41.5 - 3222
42.0 - 3245 - Light ejector mark
42.5 - 3294 - Ejector mark
43.0 - 3335 - Ejector mark
43.5 - 3363 - Heavy ejector mark, primer flattening

All of these shot a little under moa at 100 yards.

Loaded three up at 41.3, averaged 3218 with ES of 27.5, grouped under 3/4 moa, will adjust seating depth to tighten up the groups next time out. I'm pretty impressed with these velocities out of a 22" barrel.

Follow up to this post. Finished load development today, seated to 2.645 OAL, ES improved to 16 fps and grouping well under 1/2". I've got 15 rounds into load development on this, gotta love the Hammers.

 

[Varmint Hunter]

Follow up to this post. Finished load development today, seated to 2.645 OAL, ES improved to 16 fps and grouping well under 1/2". I've got 15 rounds into load development on this, gotta love the Hammers.

View attachment 399948

Nice shooting.
You've got a long way to go, if you're interested. Varget can get those 85 Hammers doing 3,700 ft/sec in a 26" Creedmoor. I had just a little primer flattening at that velocity but no ejector swipe or stiff bolt lift.

 

[JTH]

Nice shooting.
You've got a long way to go, if you're interested. Varget can get those 85 Hammers doing 3,700 ft/sec in a 26" Creedmoor. I had just a little primer flattening at that velocity but no ejector swipe or stiff bolt lift.

I'm as close to pressure signs as I want to be in this barrel. Not sure how you're getting those speeds out of a creedmoor, must have a really fast barrel, I think my 6.5SS would be in that range with considerably more powder.