300 PRC load info

[8andbait]

I'll be doing a load work up on my 300 PRC

Lone peak razor SS action
Bartlein 3B, 9 twist, 26"

Going to start with 215 bergers, H1000 and RL26.

This information is for people interested in the 300 PRC. It's not intended to be a discussion about which 30 cal is better or worse. Any 300 PRC data is welcome but please refrain from discussing other cartridges.

Hopefully this will go quick and smooth

 

[Jud96]

I'm very interested. Keep us posted

 

[8andbait]

New Hornady brass
H1000, 215 primer
215 hybrid at .020 jump

Only used magneto speed on one round of 77 grains it was 2855 FPS.

Shot round robin 3 minutes between each round
77 was about .8 MOA
77.5 was .45 MOA
78 was .55 MOA
78.5 was about .8 MOA

By the time I got to the third shot of each group mirage was terrible and barrel was very hot.

Decided not to shoot any RL26 loads due to the heat and mirage.

I'll load a few at 77.7 H1000 to try tomorrow morning before it gets too hot.

No pressure signs on any loads.

 

[Weatherby Fan]

Kimber Montana 8400 300PRC, 26" #4 Fluted, 1-9.5 twist, Benchmark Barrel
Note- NO Brake on Rifle

New Hornady Brass, Fed 215M primers, 230gr Hornady A-Tips, COAL 3.7",
Ran a string of R26 75.0grs to 76.6grs in 2gr increments

75.0-2867
75.2-2872
75.4-2888
75.6-2869
75.8-2878
76.0-2898
76.2-2899
76.4-2918
76.6-2908

I loaded up 6 of each bullet with 76.0grs R26,215M primers, all groups were 3/4" at 100 yards
Hornady 230gr A-Tips 3.7", avg vel 2888
225gr ELD-M 3.7", avg vel 2916
212gr ELD-X 3.650", avg vel 2966
Berger 210gr VLD Hunters 3.6", avg vel 2914
Lapua Scenar 220gr 3.6" avg vel 2930

I have since had a brake added to the rifle but haven't got back to the range yet,

 

[8andbait]

Got out this am

215 berger, CCI250, new brass, RL26

306 yds
75 gr 1.4" at
75.5 gr 1.3" at 2875 FPS
76 gr 1.6" at 2878 FPS

Moved out to 605 and fired 3 rounds with 3 minutes between shots.
77.7 H1000, 215 HYB, 215 primer
2893 FPS SD of 6 for three shots

 

[8andbait]

I think a shorter freebore would be better for the 215 bergers. At .020 jump there is not much bullet in the neck.

I'm going to see how the 210 vld's sit in the neck while touching.

It is ideal for the Hornady 212's and 225's though.

 

[elkaholic]

I think a shorter freebore would be better for the 215 bergers. At .020 jump there is not much bullet in the neck.

I'm going to see how the 210 vld's sit in the neck while touching.

It is ideal for the Hornady 212's and 225's though.

I think with that group, I wouldnt worry about the FB

 

[Vol1975]

I think a shorter freebore would be better for the 215 bergers. At .020 jump there is not much bullet in the neck.

I'm going to see how the 210 vld's sit in the neck while touching.

It is ideal for the Hornady 212's and 225's though.

I'm in the process of a build and part of my build is having a reamer made. My reamer has 200th freebore. Any thoughts on the 215 bergers with that freebore amount.
my understanding is a OEM reamer is 236 freebore. At least I think it is buy my understanding.

 

[elkaholic]

I'm in the process of a build and part of my build is having a reamer made. My reamer has 200th freebore. Any thoughts on the 215 bergers with that freebore amount.
my understanding is a OEM reamer is 236 freebore. At least I think it is buy my understanding.

My 30 SM shoots 215's great with .237" FB and its an improved prc. That said, .200" FB is enough for the 215 and would get your coal down to around 3.690" to the lands if you wanted it shorter

 

[Vol1975]

I'll be doing a load work up on my 300 PRC

Lone peak razor SS action
Bartlein 3B, 9 twist, 26"

Going to start with 215 bergers, H1000 and RL26.

This information is for people interested in the 300 PRC. It's not intended to be a discussion about which 30 cal is better or worse. Any 300 PRC data is welcome but please refrain from discussing other cartridges.

Hopefully this will go quick and smooth

Information straight from Berger personnel over the phone.
update: loads for my gun on h1000 was on the hot side. I'd start on the very low end and work up.

 

[8andbait]

I think with that group, I wouldnt worry about the FB

Yeah it looks good so far, we shall see how it does over time.

I now have 100 pieces of Fired brass with skimmed necks that are annealed. Just need some 30 degree days...

 

[8andbait]

215 berger at .020

 

[Jud96]

215 berger at .020

View attachment 147301

That's not bad. I wouldn't worry about the freebore, shoots good the way it is.

 

[elkaholic]

215 berger at .020

View attachment 147301

I think the prc has .242" FB