The Creedmoor Forum

So I reduced the pet load of 42.0gr of H4350 that my RPR likes to 41.8gr of H4350, and tested 10 rounds using the suppressor.  Holy shit Batman!

 
Both groups of 5 shots can be covered with a dime.  I think I found the load. 

Quote from: badger tuff on March 16, 2017, 12:56:50 PMHow do you like that Reloder 16? Have you used it in the 6.5 CM?

I am still waiting for the shipment from Graf & Sons.  As soon as I get I will work up a new load on Lapua brass.  I will let you know how it works out for me.

It is also available at Graf & Sons.  Since I have to work up my loads again for the new Lapua brass, and H4350 is a pain in the rear to get, I decided to go with Reloader 16.

Quote from: drybean on March 14, 2017, 07:49:52 PMHow about a feed back area  ,so you can leave feedback on selling or trades
would like to leave Positive feedback on my last 2 deals

    Jim

You can leave feedback in the Angie's List board.

Quote from: quickdraw on March 08, 2017, 07:23:03 PMGo to a Rebel 17 Tumbler and you're good to go. Look into the RCBS Rock Chucker Supreme Kit which will get many of those tools at a discount.

+1 on this.  Get rid of the ultrasonic cleaner and get the Rebel 17.

I got a Silencerco Saker 7.62. Even with ear protection my right ear hurts when I shoot without the suppressor. After shooting suppressed yesterday, it just felt great. No pain and less perceived recoil. 

Quote from: jvw2008 on March 07, 2017, 09:10:11 PMTxcas - have you chronographed your rounds with the suppressor on and off?  I've not worked thru this load development issue so I'm interested in hearing what changes you have to make to your original load to get your accuracy back.

JV

I plan to chrono my current load with the suppressor this Saturday. I will update this post. 

Quote from: MLN1963 on March 07, 2017, 08:06:35 PMI have asked the same question of the guys in the shooting club I'm in. Several guys said their guns turned into shotguns once they added the suppressor. They had to go back to square one and redo their load development. They all found what their gun likes with the suppressor mounted and are accurate once again. Only one guy said his POI changed but the accuracy did not. I am just developing a load now for unsuppressed and fully expect to have to start all over when my suppressor is released from jail.

Thanks.  I guess will I have to work up another load because after shooting the rifle suppressed, I don't want to shoot it any other way.  

I worked a load for my RPR.  It loves 42.0 gr of H4350.  Today for the first time I tried my .308 suppressor on the RPR.  I was expecting the POI to change (and it went down), but I was not expecting the bullets to be all over the place.  Do you work up loads for both suppressed and not suppressed shooting?

Quote from: bowman3899 on February 23, 2017, 10:55:32 AMYour velocity looks a little on the low side. Have you verified it?

Yes, that velocity is right.  I was getting 2,667 fps with 41.9 gr of H4350.  The chrono is a LabRadar and the speeds are in par with what a Magnetospeed v3 used to read.  I went up all the way to 43.1 grains, but could not find a good node at higher velocities.  I also shot up to 1,200 yds last weekend using 2,667 fps for my dope, and it was almost dead on.

I think I found the load for my RPR.  42.0 gr of H4350.  On paper the 41.9 gr group looked great, but the chrono does not lie about the 42.0 gr load:

Average: 2683
Highest: 2688
Lowest 2680
ES: 8
SD: 3.2
Shots: 5

That was with CCI BR2 primers and never fired Hornady brass.

Interesting, I am working up the same load for the same rifle and just found this thread.  So far 41.9 gr of H4350 seems to be the winner, but I am now refining it by also testing with .1 increments from 41.8 to 42.1.  The average speed on my 41.9 gr load is 2,667 fps.  This load is almost identical to factory ammo using the 140 ELD-M bullets.  While my ES and SD are lower than Hornady's, they are still high in my opinion.

I attached the spreadsheet to this thread.

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Quote from: Rustypipes12 on February 06, 2017, 06:32:19 AMThe word verification thing on here is KILLING me!! It takes me about twenty tries to post and I have to admit i'm about ready to quit trying!

Now that you have 5 posts, verification should be over.  We use that to prevent SPAM from newly registered members.  Lately we have not had many assholes from the Philippines posting crap here, because @Aussie65 and I are on top of it and because of other anti-SPAM measures like this one.