close
Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Berger Bullets

Reply

.375 H&H 300g bullets best velocity

LinkBack Thread Tools Display Modes
  #36  
Unread 12-12-2013, 09:22 AM
Silver Member
 
Join Date: Jul 2012
Location: Washington State
Posts: 491
Re: .375 H&H 300g bullets best velocity

Lefty

Thought about that. Problem: only can I have is 30 years old. I haven't seen 4320 on the shelves in about four years. Delivers top velocity and accuracy in 150-30/06. If I can find new stock I will try some. Same speed range as 760/414, Biggame, and RL15.

KB
Reply With Quote
  •   #37  
    Unread 12-16-2013, 11:56 AM
    Silver Member
     
    Join Date: Nov 2007
    Location: Near Mt Rainier
    Posts: 302
    Re: .375 H&H 300g bullets best velocity

    H4350 and IMR 4350 are single base powders and very old technology. The Reloader 17 is a new formula and is significantly faster with similar pressure. The VithaVuori N-540 produced 2800 fps easily with 260 gr Accubonds on the bench next to me at the range yesterday (375 Ackley 26 inch barrel).

    VV N-550 has the same burn rate as 4350 but significantly more zoom. If speed is your game, VV 500 series is the fastest you are going to get.
    Reply With Quote

      #38  
    Unread 12-16-2013, 12:36 PM
    Silver Member
     
    Join Date: Jul 2012
    Location: Washington State
    Posts: 491
    Re: .375 H&H 300g bullets best velocity

    65WSM

    Ditto to what you posted except burning rate. H4350/ IMR 4350. RL17 and VV 540/550 have about the same burn rate. VV540/550 and RL 17 are both double based as compared to single based powder. Their rates are adjusted to approximate 4350 but their energy density is higher owing to the added nitroglycerin content. Like you I have found they have more energy to develop velocity than 4350. They burn hotter too so it has an effect on barrel life. Probably not enough to concern 375 H&H shooters.

    Reloader is denser physically also. Ball powder even more so. In a 375 Ruger case filled to the shoulder/ neck junction (same case for all three):
    Superformance (ball)= 95.6 grains
    Reloader 19 (double based stick)= 89.6 grains
    IMR 4831 (single based stick)= 84.6

    You can use this to your advantage by utilizing the extra powder density to shift your burning rate choice to the slower end. By switching to ball powder you can really move slower. Superformance, BigGame, WW760 and AA2700 that I have used in the 375 Ruger so far are no where near 100% loaded density. I am looking at WW780 and slower ball types to fill the case and still reach top pressures.

    That has worked for me to develop maximum velocity in the past. Doesn't guarantee accuracy though.

    KB
    Reply With Quote
      #39  
    Unread 12-26-2013, 07:58 AM
    Platinum Member
     
    Join Date: Dec 2009
    Posts: 1,279
    Re: .375 H&H 300g bullets best velocity

    I stumbled across this .375 H&H load data. Food for thought:

    Real Guns - Handload Data - .375 H&H Magnum
    Reply With Quote
      #40  
    Unread 12-27-2013, 09:32 PM
    Silver Member
     
    Join Date: Jul 2012
    Location: Washington State
    Posts: 491
    Re: .375 H&H 300g bullets best velocity

    Real Guns online magazine is one of my primary research places for loads. His work on the 375 Ruger was a deciding factor in buying one.
    There are different bullets than the regular makers used, like the GSC's Len advertises on this site. He also uses a wide range of burning rate powders. He loaded RL19 behind the Sierra 300gr SpBT in 375 Ruger to good effect. Be advised that some of the loads can be pretty hot.
    Always a good plan to collect as much data as one can before sitting down to the loading bench.

    KB
    Reply With Quote
      #41  
    Unread 12-29-2013, 01:53 AM
    Platinum Member
     
    Join Date: Dec 2009
    Posts: 1,279
    Re: .375 H&H 300g bullets best velocity

    Here is some load data that I received from Cutting Edge bullets while discussing how to tune the MTH's:

    375 H&H, 300 MTH and 325 LAZER, for single shot or single feed ONLY, 11-26-13.pdf

    I thought this might be interesting given our discussions about appropriate powders and burn rates. Note that data is included for the soon to be released 325 grain Lazers.
    Reply With Quote
      #42  
    Unread 04-19-2014, 03:29 PM
    Silver Member
     
    Join Date: Jul 2013
    Posts: 302
    Re: .375 H&H 300g bullets best velocity

    Thank you for posting the info here. I am considering to pick up a 375 H&H or similar, and it is always helpful to have the path partly blazed before you jump in.

    I had actually been looking at moderate recoil / 2000 FPS / using CEB 235 grain Raptor ER round for my use, but after looking at the BC of those MTH rounds - wow.

    There are just so many decent performance rounds at reasonable prices for this caliber, it is hard to not consider it.
    Reply With Quote
    Reply

    Bookmarks

    Thread Tools
    Display Modes



    All times are GMT -5. The time now is 11:26 AM.


    Powered by vBulletin ©2000 - 2017, Jelsoft Enterprises Ltd.
    Content Management Powered by vBadvanced CMPS
    All content ©2010-2015 Long Range Hunting, LLC