Hi Guys:

Well took Frenchy to the range today for her maiden shoot. It was a hoot to say the least. I loaded up eight rounds of RL-15, filler and all (4) 85 grains and (4) 86 grains. Also (4) rounds H4831 104 grains (4) 106 grains.

16 shots was about all my shoulder could take, standing,shooting off sticks.

The rifle definitely likes RL-15 compared to the H4831. Long story short 86 grains shot 4 shots in 1.5 inches at 50 yards velocity at 2095 FPS. Problem with that is group is two inches low, and two inches to the left. I am going to try 87 & 88 grains and see where that takes me.

If I were to stay with the 86 grain group. Do I adjust the sights some how to shoot point of aim? I could lower the front sight to get to center, but what amount left to right? These sights don't look like they drift left or right. Or do I keep doing load development until it shoots to center?

Also those Woodleigh bullets really left alot of copper in the barrel. It was a bitch to clean. What is a good spray in barrel, let soak, copper remover?

Thoughts and comments appreciated.

Regards... Jim P.

quote:

What is a good spray in barrel, let soak, brasss remover?

Do you mean copper remover?

If so, I use Wipe Out with accelerator on my barrels.

Hi 577 Nitro:

Yeah I said brass I meant copper. I was going to try Gunslick.

Thanks... Jim P.

Jim,
There should be two small locking screws on the rear sight--one just in front of the uprite leaf, and one under the fold-down 300 yd leaf. Loosen these two screws, then the rear sight base can be adjusted (with significant pressure or with precision impact) for impact. It sounds like you have a good load, and just need to adjust the sights. If the group is left-of-target, move the rear sight to the right. For a low group, try the flip-up sights.

Sounds like you have a good shooter.

Where did the 85gr load hit?

Also could you tell any difference in the recoil between RL 15 and H4831?

Jim sounds good.. a little more twiking and she will lay them right in there...

Mike

Hi Steve:

You are correct, I never even noticed the little screws underneath the 100 yard and 200 yard flip up sights. I could adjust left to right. I could use the 100 yard leaf and see where that shoots, but it also looks like I can lower the fornt sight. I would let my gunsmith do that I think.

NE 450: The first two 85 grain shots were to the left about 4 inches and about 3in in height away from each other. The second two were scattered. Remember these were the very FIRST four shots I have ever taken with a 470 NE double rifle in my life.

Recoil was noticeably more stiiff with the H4831, than the RL-15. And with H4831 106 grains less velocity.

It seems the shots are moving to the right and higher on target with the increase in powder charge. I want to see where RL-15 87, 88 and 89 grains takes me.

I was just reading in a gun mag there is a new RL-17 powder out. It matches the burn rate of IMR-4350. I wonder if this would play in the 470 NE with no filler.

I gotta tell you though. I have to use 2 grains or LESS dacron filler in my cases, If I use to much more it bulges the case neck a bit.

Regards... Jim P.

Sounds like you are getting it together.

Let us know how the other loads shoot.

I have never seen a Chapuis 470 that did not shoot good.

Jim, sounds like you have a keeper. Hope you can get a shorter front post, some of them are already as low as you can get from the factory. Yea, the R-15 is hard to beat in most big bore DR's.

quote:

Originally posted by PAHunter:
Recoil was noticeably more stiiff (sic) with the H4831, than the RL-15. And with H4831 106 grains less velocity.

The last sentence is confusing. Typo perhaps? Or concussive effects?

Hi onefunzr2:

The recoil from both loads of H4831 kicked more than the RL-15 86 grain load. The max average velocity of the H4831 106 grains was 2068. My average velocity of the RL-15 86 grains was 2092.

So it kicked less, with more velocity, for the RL-15 load.

Regards.. Jim P.

PAHunter has confirmed what several other Nitro Express shooters have also stated, that loads with RL 15 kick noticably less than loads with slower powders.

I also found that in my 450 No2 RL 15 showed lower pressure as well as less recoil.

In most Nitro Express cartridges you MUST use a filler with RL 15. There is no problem as long as the filler is compressed.

AS a side note I have found it necessary to use a filler in my 450 No2 even if I use IMR 4831.

The same will be true of the 475 No2.

quote:

Originally posted by PAHunter:
Hi onefunzr2:

The recoil from both loads of H4831 kicked more than the RL-15 86 grain load. The max average velocity of the H4831 106 grains was 2068. My average velocity of the RL-15 86 grains was 2092.

So it kicked less, with more velocity, for the RL-15 load.

Regards.. Jim P.

Interesting I will try it in mine, did you use 2 gr of the poly filler with the 59 gr RL15?

Hi Tradewinds:

Here is what I did, I filled a case with 86 grains of RL-15, I inserted a wooden dowel and put it against the powder and made a pen mark at the top of the neck on the dowel. I took out the dowel and put a Woodleigh bullet at the top of the mark where the crimping groove is. The difference of the end of the bullet and the end of the dowel is the air space between the powder charge and the base of the bullet. There is only about 1/2 inch of air space!!!!

When I tried 6 grains of the dacron stuff I am using I bulged the neck on the case. I am using less than 2 grains now, stuff in the case and when loaded you can shake the shell with no powder movement. As my powder charge goes up to say 87, 88, 89 grains the need for the filler is almost nill..?? I also am using a slight crimp.

In a rifle case this big and say 89 grains of RL-15 air space will probably be 1/4 inch, do we really need filler?

Inquiring minds want to know?

Regards... Jim P.

quote:

In rifle case this big and say 89 grains of RL-15 air space will probably be 1/4 inch, do we really need filler?

Inquiring minds want to know?

That is a good question. I have read the Federal uses RL15 but a 216 Primer which is hotter burning so the space is no problem.

quote:

Remember these were the very FIRST four shots I have ever taken with a 470 NE double rifle in my life.

PAHunter:

Before you start moving sights, I would suggest a little more range time with your new mistress. As you mentioned in your post, you are new to shooting DRs, and especially the .470, I would advise caution in moving metal until you are comfortable in your rifle and the recoil. I would also suggest that you solicit shooting from other shooters with you load to see how they impact on your targets.

And yes, with RL-15, you do want some filler to help hold the powder against the primer, but not so much to compress the powder and bulge the case with your filler, something I have done with my .500 and .577 - - bad ju-ju

Hi 577NE:

Nope I am waiting before I start moving metal. Like I stated I want to try 87, 88, & 89 grains of RL-15 and see how it regulates. Naturally I will be checking velocity, pressure signs, and AS and SD with the Chrony.

I am hoping as my velocity increases my shots will be printing higher and higher. But after many thousands of reloads I know this is not always the case.

REgards... Jim P.