Author Topic: First big bore build (Read 20424 times - 2 votes)
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sb327 · « **Reply #40 on:** September 01, 2021, 12:19:28 PM »

You should be proud!! Excellent work!

Dave

Madd Hatter · « **Reply #41 on:** September 01, 2021, 03:15:30 PM »

Quote from: Scotchmo on August 31, 2021, 10:46:52 PM

The first competition test of my big bore build went great. I entered four events at the Rocky Mountain Airgun Challenge (RMAC) last week. I brought a modified Hatsan Bullboss to shoot three different pellet matches and had my custom Armada .257 for the Magnum Slug Challenge. After dedicating the Armada to slugs only, I sorta rushed the build of the Bullboss pellet shooter. Shooting 18.1gr pellets was fun, but not ready for prime time at the match. The days of competition were long and after struggling with the speed shooting match, I decided to drop my spot in the next morning's precision pellet match in order to rest up and concentrate on the Magnum Slug match.

The match was divided into two heats. Each heat had four stages with two targets in each stage. No sighter shots allowed. We shot each target twice for points so every shot had to count. Targets were arranged somewhat radially down range. Target distances were approximately 75, 100, 130, 187, 200, 229, 267, and 290yds for the eight targets. I said “approximately” since each shooter had their own bench for the duration of the match. So where you sat in relation to the radial spread would determine the actual target distance.

I had generated dope at my local range in California. Sea level, 70 F. The RMAC range was at 4600ft elevation, 85F, with some targets up the hillside at angles up to 15 degrees. My Iphone was wonky after dropping it the prior week so I did not want to rely on it for calculating the trajectory changes and compensation during the match. I translated my D.O.P.E. according to the local conditions the night before and made notes on paper for various distances and angles. At the match, I used my laser range finder to measure the range and inclines, and then picked correct click values from my notes, before engaging each target. I think two of my misses were from trajectory data errors as it seemed to be hitting consistently high by up to 2moa on the mid range targets (187yds-229yds).

I ended up missing only three out of the sixteen target shots. Good enough for 2nd place and $1000 prize!

https://www.rockymountainairgunchallenge.com/rmac-2021

So, you were first loser? J/K

Excellent shooting.👍👍

BigBird · « **Reply #42 on:** September 01, 2021, 03:36:13 PM »

Wow. Thats great!

Scotchmo · « **Reply #43 on:** September 01, 2021, 05:47:19 PM »

I was pretty proud of the gun (and shooter) after hitting all four of the farthest shots at 267 and 290 yards, both elevated up the hillside. Farthest target at 290 yards had a probable hit zone of 11" diameter at the aim point. That's about 4moa diameter. Up until that shot, I had never shot at those exact distances and elevations. DOPE (click values) came from Chairgun after inputing all parameters from prior shooting sessions. I was kinda worried about windage errors, but as it turned out, it was elevation errors where I had most misses, and near misses. But I did get lucky on at least a couple of shots as I hit very close to the top edge. I shot over the top of the 200yd target twice, as I was trying to takes advantage of the broader windage area at the "Sasquatch's" shoulder height. Since the "Sasquatch" was taller than wide, if I had known that windage was not so much an issue, I would have aimed on center and probably have hit it.

Motorhead · « **Reply #44 on:** September 01, 2021, 06:15:49 PM »

Well played Scott ... very well played !!

JuryRigger · « **Reply #45 on:** September 02, 2021, 01:07:35 AM »

Many congratulations!

It must be gratifying to see all the hard work and testing that you have done pay off (to the tune of 1 grand

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Jesse

MJP · « **Reply #46 on:** September 02, 2021, 03:01:37 AM »

Nice build for sure, and an awesome outcome for the build!
Range card sure has it's place when shooting multiple targets and distances.
I do like that breech design with integrated scope mount. What a beautiful rifle!

Marko

Scotchmo · « **Reply #47 on:** October 13, 2021, 12:37:19 AM »

Another successful outing with the Armada HP .257
1st place at the EBR Open Big Bore match

2 shots at each targets, cold bore with no warm up shots or sighter shots, though some others shared a gun so almost like sighter shots for the second shooter.

Prone:
73yds (5pts each) and 121yds (10pts each)

Standing, unsupported:
31yds (5pts each) and 92yds (10pts each)

Standing with shooting sticks:
37yds (5pts each) and 81yds (10pts each)

Bench:
191yds (5pts each) and 310yds (10pts each)
121yds (5pts each) and 241yds (10pts each) and 395yds (10pts each)

TleVta · « **Reply #48 on:** October 13, 2021, 12:39:57 AM »

Well done, Scott! How did you do on the 395y target?

sb327 · « **Reply #49 on:** October 13, 2021, 01:05:41 AM »

Excellent! So the story with this machine continues.

You should be proud!

Dave

Scotchmo · « **Reply #50 on:** October 13, 2021, 01:25:51 AM »

Quote from: TleVta on October 13, 2021, 12:39:57 AM

Well done, Scott! How did you do on the 395y target?

Not good. Farthest testing I had done was 300m. I extrapolated the dope out to 395 yards. No sighter shots and I had no spotter. I did not see where the first miss went, so I shot the second shot at same aim point. It splashed in the dirt just to the right with near perfect elevation. I think I could have hit it if I had another shot. I was encouraged by that elevation predictability for future matches. I could not see/feel it, but here was probably a 2+ mph wind which could blow it far enough off course. Out of all the shooters, only two hit the 395yd target. The first shooter to do it hit barely on the right edge. The last shooter was John Bagakis who is a great shooter, but he also had the benefit of shooting the same gun as Kip Perow who shot first and then provided John with the dope. He hit near center both times, probably with about a 1 or 2 moa spread.

I hit all the other targets at least once. I think these were my hits:

73yds, 1/2, prone first cold shot was low. Maybe a sticky valve. I should have asked to blow off just air before starting.
121yds, 2/2
31yds, 1/2 offhand
92yds, 1/2 offhand
37yds, 2/2 standing
81yds, 2/2 standing
191yds, 2/2
310yds, 1/2
121yds, 2/2
241yds, 1/2 I actually hit it 2/2 but the scorer did not see the flash so I shot lower on the paddle for more leverage on the 2nd shot, and he saw that hit. The 160fpe is kinda marginal for the heavy swinger targets.
395yds, 0/2

rsterne · « **Reply #51 on:** October 13, 2021, 01:31:26 AM »

Congratulations, Scott.... It must be very satisfying to win using a gun you made yourself....

Bob

JuryRigger · « **Reply #52 on:** October 13, 2021, 11:39:02 AM »

Wow... Congrats!!
Jesse

BigBird · « **Reply #53 on:** October 13, 2021, 08:05:30 PM »

Awesome!
Man makes airgun, makes bullets, tunes air and electronics,, competes and wins, and wins!
I wonder how many people make their own air guns and then take them to compete and win?

Airgun-hobbyist · « **Reply #54 on:** October 13, 2021, 08:34:51 PM »

Excellent job! Congratulations.

Loren · « **Reply #55 on:** October 13, 2021, 10:42:59 PM »

Congrats!!! Very cool taking the "Big Comp" with the .257.

TleVta · « **Reply #56 on:** October 14, 2021, 01:11:50 AM »

At the end of this one, Scott talks about one of his other airguns at the match.

Wickedwoods1 · « **Reply #57 on:** October 19, 2021, 10:37:51 PM »

Nice!

Scotchmo · « **Reply #58 on:** October 21, 2021, 04:34:00 PM »

The below video has some more info on my .257 Armada. Check out the first 5 minutes:

mackeral5 · « **Reply #59 on:** October 21, 2021, 06:11:31 PM »

awesome journey, thank you for taking us along for the ride.

First big bore build

Author Topic: First big bore build (Read 20424 times - 2 votes) )

Author Topic: First big bore build (Read 20424 times - 2 votes)
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